diff --git a/README.md b/README.md
index bdaa85a..6c7f657 100644
--- a/README.md
+++ b/README.md
@@ -70,6 +70,102 @@ import { WaveformChart } from './index'
 自适应高度要求父容器具有明确高度；父容器未定高时，组件使用最低 `180px` 高度。
 显式高度同样保留 `180px` 下限。非有限尺寸按未指定处理，负宽度归零。
 
+### 图表标题
+
+`title` 在整个波形网格上方渲染一次，支持显隐、对齐、字体样式和旋转：
+
+```vue
+<WaveformChart
+  :data="chartData"
+  :title="{
+    visible: true,
+    text: 'Shot:4712',
+    align: 'center',
+    textStyle: {
+      color: '#1f2937',
+      fontSize: 14,
+      fontFamily: '"Microsoft YaHei", "微软雅黑", sans-serif',
+      rotation: 0,
+      fontWeight: 400,
+      fontStyle: 'normal',
+      textDecoration: 'none',
+      letterSpacing: '1px',
+    },
+  }"
+/>
+```
+
+对应的公开类型为 `WaveformTitleOptions` 和 `WaveformTitleTextStyle`。未传 `title`、
+`visible` 为 `false`，或 `text` 去除首尾空格后为空时，标题不渲染且不占高度。标题默认
+居中、字号 `14px`、颜色 `#1f2937`、微软雅黑、常规字重且不旋转。标题区域高度按文字及旋转角度
+在 `44px` 至 `160px` 之间计算；超长文字会省略，悬浮可查看完整内容。
+
+`width` 和 `height` 始终表示组件总尺寸。标题显示后会从总高度中扣除标题区域，剩余高度
+用于 SVG 绘图区，因此启用标题不会扩大组件或破坏父容器布局。
+
+宿主已有全局标题配置时，可以在未来接入组件库绘图链路时按以下方式映射：
+
+```ts
+const waveformTitle = {
+  visible: hasQueried && !cleanViewEnabled && titleStyle.enabled,
+  text: titleStyle.titleName.trim() || defaultTitleText,
+  align: titleStyle.align,
+  textStyle: {
+    color: titleStyle.color,
+    fontSize: titleStyle.fontSize,
+    fontFamily: titleStyle.fontFamily,
+    rotation: titleStyle.rotation,
+    fontWeight: titleStyle.bold ? 700 : 400,
+    fontStyle: titleStyle.italic ? 'italic' : 'normal',
+    textDecoration: titleStyle.underline ? 'underline' : 'none',
+  },
+} satisfies WaveformTitleOptions
+```
+
+宿主的抽屉折叠状态不需要传给组件。替换绘图链路时应同步移除宿主外层标题，避免重复
+渲染；当前宿主实现无需修改。
+
+Demo 左侧控制面板提供标题实时预览，可配置标题名称、显隐、对齐、字体、字号、粗体、
+斜体、下划线、旋转和颜色。字号范围为 `8–72px`，旋转范围为 `-180–180°`；样式栏中的
+`A` 用于恢复常规字重、非斜体和无下划线，关闭标题不会清除已经填写的配置。
+
+### 图框样式
+
+`frameStyle` 统一设置所有非空图框的边框和背景，颜色支持带 alpha 的 CSS 颜色值：
+
+```vue
+<WaveformChart
+  :data="chartData"
+  :frame-style="{
+    borderColor: 'rgba(31, 41, 55, 0.8)',
+    borderWidth: 2,
+    borderStyle: 'dashed',
+    backgroundColor: 'rgba(14, 165, 233, 0.08)',
+  }"
+/>
+```
+
+对应的公开类型为 `WaveformFrameStyle`。默认边框颜色为 `#1f2937`、线宽为 `1`、线型为
+`solid`，背景透明。`borderWidth` 为 `0` 时隐藏边框；非有限值或负数会回退到默认线宽。
+
+### 图例样式
+
+`legend.backgroundColor` 设置多曲线图例的背景颜色。该字段接受任意有效 CSS 颜色值，
+可通过 `rgba(...)` 或 `hsla(...)` 中的 alpha 通道调整透明度：
+
+```vue
+<WaveformChart
+  :data="chartData"
+  :legend="{
+    position: 'top-right',
+    orientation: 'auto',
+    backgroundColor: 'rgba(255, 255, 255, 0.45)',
+  }"
+/>
+```
+
+未配置或传入空字符串时，图例背景默认使用 `rgba(255, 255, 255, 0.7)`。
+
 ## 大数据渲染
 
 组件按不可变数据处理：替换 `data` 引用会重新过滤、排序和缓存坐标域，并重置视口；
diff --git a/src/App.test.ts b/src/App.test.ts
new file mode 100644
index 0000000..499c548
--- /dev/null
+++ b/src/App.test.ts
@@ -0,0 +1,184 @@
+import { flushPromises, mount } from '@vue/test-utils'
+import { InputNumber, Select } from 'ant-design-vue'
+import { describe, expect, it } from 'vitest'
+import { ColorPicker } from 'vue3-colorpicker'
+
+import App from './App.vue'
+
+describe('App workspace layout', () => {
+  it('places controls in the sidebar beside the chart', async () => {
+    const wrapper = mount(App)
+    await flushPromises()
+
+    const panel = wrapper.get('#waveform-control-panel')
+    const frameControls = panel.get('.frame-style-controls')
+    expect(panel.find('h1').exists()).toBe(false)
+    expect(panel.find('[aria-label="波形展示方式"]').exists()).toBe(true)
+    expect(panel.find('[aria-label="波形网格尺寸"]').exists()).toBe(true)
+    expect(frameControls.findAllComponents(ColorPicker)).toHaveLength(2)
+    expect(frameControls.text()).toContain('边框颜色')
+    expect(frameControls.text()).toContain('背景颜色')
+    expect(frameControls.find('[aria-label="图框线宽"]').exists()).toBe(true)
+    expect(frameControls.find('[aria-label="图框线型"]').exists()).toBe(true)
+    expect(frameControls.find('[aria-label="显示图框水印"]').exists()).toBe(true)
+    expect(frameControls.get('.frame-style-control--switch .ant-switch').classes()).toContain(
+      'ant-switch-small',
+    )
+    const titleControls = panel.get('.title-controls')
+    expect(panel.find('[aria-label="显示标题"]').exists()).toBe(true)
+    expect(titleControls.find('[aria-label="标题名称"]').exists()).toBe(true)
+    expect(titleControls.find('[aria-label="标题对齐方式"]').exists()).toBe(true)
+    expect(titleControls.find('[aria-label="标题字体"]').exists()).toBe(true)
+    expect(titleControls.find('[aria-label="标题字号"]').exists()).toBe(true)
+    expect(titleControls.find('[aria-label="标题旋转角度"]').exists()).toBe(true)
+    expect(titleControls.findAllComponents(ColorPicker)).toHaveLength(1)
+    expect(panel.find('[aria-label="图例位置"]').exists()).toBe(true)
+    expect(panel.find('[aria-label="图例排列"]').exists()).toBe(true)
+    const legendColorControl = panel.get('.legend-color-control')
+    const legendColorPicker = legendColorControl.getComponent(ColorPicker)
+    expect(legendColorControl.text()).toContain('背景')
+    expect(legendColorPicker.props('pureColor')).toBe('rgba(255, 255, 255, 0.7)')
+    expect(legendColorPicker.props('disableAlpha')).toBe(false)
+    expect(panel.text()).not.toContain('数据摘要')
+    expect(wrapper.get('.chart-panel').find('.waveform-chart').exists()).toBe(true)
+
+    wrapper.unmount()
+  })
+
+  it('updates title content, text styles, and visibility', async () => {
+    const wrapper = mount(App)
+    await flushPromises()
+
+    const renderedTitle = () => wrapper.get('.waveform-chart__title-text')
+    expect(renderedTitle().text()).toMatch(/^Shot:\d+$/)
+    expect(renderedTitle().attributes('style')).toContain('Microsoft YaHei')
+    expect(renderedTitle().attributes('style')).toContain('font-size: 14px')
+    expect(renderedTitle().attributes('style')).toContain('font-weight: 400')
+
+    await wrapper.get('input[aria-label="标题名称"]').setValue('实验标题')
+    await wrapper.get('[aria-label="标题粗体"]').trigger('click')
+    await wrapper.get('[aria-label="标题斜体"]').trigger('click')
+    await wrapper.get('[aria-label="标题下划线"]').trigger('click')
+    await flushPromises()
+
+    expect(renderedTitle().text()).toBe('实验标题')
+    expect(renderedTitle().attributes('style')).toContain('font-weight: 700')
+    expect(renderedTitle().attributes('style')).toContain('font-style: italic')
+    expect(renderedTitle().attributes('style')).toContain('text-decoration: underline')
+
+    await wrapper.get('[aria-label="恢复标题常规样式"]').trigger('click')
+    await flushPromises()
+    expect(renderedTitle().attributes('style')).toContain('font-weight: 400')
+    expect(renderedTitle().attributes('style')).toContain('font-style: normal')
+    expect(renderedTitle().attributes('style')).toContain('text-decoration: none')
+
+    await wrapper.get('[aria-label="显示标题"]').trigger('click')
+    await flushPromises()
+    expect(wrapper.find('.waveform-chart__title-area').exists()).toBe(false)
+
+    wrapper.unmount()
+  })
+
+  it('updates every visible frame from the frame style controls', async () => {
+    const wrapper = mount(App)
+    await flushPromises()
+
+    const frameControls = wrapper.get('.frame-style-controls')
+    const colorPickers = frameControls.findAllComponents(ColorPicker)
+    const widthInput = frameControls.findAllComponents(InputNumber)[0]
+    const styleSelect = frameControls.findAllComponents(Select)[0]
+
+    expect(colorPickers).toHaveLength(2)
+    expect(widthInput).toBeDefined()
+    expect(styleSelect).toBeDefined()
+
+    colorPickers[0].vm.$emit('update:pureColor', 'rgba(220, 38, 38, 0.8)')
+    colorPickers[1].vm.$emit('update:pureColor', 'rgba(14, 165, 233, 0.25)')
+    widthInput?.vm.$emit('update:value', 3)
+    styleSelect?.vm.$emit('update:value', 'dashed')
+    await flushPromises()
+
+    const frames = wrapper.findAll('.waveform-chart__plot-frame')
+    const backgrounds = wrapper.findAll('.waveform-chart__plot-background')
+    expect(frames.length).toBeGreaterThan(1)
+    expect(backgrounds).toHaveLength(frames.length)
+    frames.forEach((frame) => {
+      expect(frame.attributes()).toMatchObject({
+        stroke: 'rgba(220, 38, 38, 0.8)',
+        'stroke-width': '3',
+        'stroke-dasharray': '6 4',
+      })
+    })
+    backgrounds.forEach((background) => {
+      expect(background.attributes('fill')).toBe('rgba(14, 165, 233, 0.25)')
+    })
+
+    wrapper.unmount()
+  })
+
+  it('shows and hides every frame watermark from the frame style controls', async () => {
+    const wrapper = mount(App)
+    await flushPromises()
+
+    const watermarkToggle = wrapper.get('[aria-label="显示图框水印"]')
+    const initialWatermarks = wrapper.findAll('.waveform-chart__watermark')
+    const initialFrameNumbers = initialWatermarks.map((watermark) => watermark.text())
+
+    expect(initialWatermarks.length).toBeGreaterThan(1)
+
+    await watermarkToggle.trigger('click')
+    await flushPromises()
+    expect(wrapper.findAll('.waveform-chart__watermark')).toHaveLength(0)
+
+    await watermarkToggle.trigger('click')
+    await flushPromises()
+    expect(
+      wrapper.findAll('.waveform-chart__watermark').map((watermark) => watermark.text()),
+    ).toEqual(initialFrameNumbers)
+
+    wrapper.unmount()
+  })
+
+  it('updates every visible legend from the alpha-enabled background picker', async () => {
+    const wrapper = mount(App)
+    await flushPromises()
+
+    const colorPicker = wrapper.get('.legend-color-control').getComponent(ColorPicker)
+    colorPicker.vm.$emit('update:pureColor', 'rgba(15, 118, 110, 0.35)')
+    await flushPromises()
+
+    const legendPanels = wrapper.findAll('.waveform-legend__panel')
+    expect(legendPanels.length).toBeGreaterThan(0)
+    legendPanels.forEach((panel) => {
+      expect(panel.attributes('style')).toContain('background-color: rgba(15, 118, 110, 0.35)')
+    })
+
+    wrapper.unmount()
+  })
+
+  it('opens and closes the mobile control drawer', async () => {
+    const wrapper = mount(App)
+    const toggle = wrapper.get('.mobile-control-toggle')
+
+    expect(toggle.attributes('aria-expanded')).toBe('false')
+    expect(wrapper.get('.control-panel').classes()).not.toContain('is-open')
+    expect(wrapper.find('.control-backdrop').exists()).toBe(false)
+
+    await toggle.trigger('click')
+    expect(toggle.attributes('aria-expanded')).toBe('true')
+    expect(wrapper.get('.control-panel').classes()).toContain('is-open')
+    expect(wrapper.find('.control-backdrop').exists()).toBe(true)
+
+    await wrapper.get('.control-backdrop').trigger('click')
+    expect(toggle.attributes('aria-expanded')).toBe('false')
+    expect(wrapper.get('.control-panel').classes()).not.toContain('is-open')
+
+    await toggle.trigger('click')
+    window.dispatchEvent(new KeyboardEvent('keydown', { key: 'Escape' }))
+    await flushPromises()
+    expect(toggle.attributes('aria-expanded')).toBe('false')
+    expect(wrapper.find('.control-backdrop').exists()).toBe(false)
+
+    wrapper.unmount()
+  })
+})
diff --git a/src/App.vue b/src/App.vue
index 9adbf10..8cc4d1b 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,14 +1,20 @@
 <script setup lang="ts">
-import { InputNumber, Radio, Tag } from 'ant-design-vue'
-import { computed, ref, watch } from 'vue'
+import { Button, Input, InputNumber, Radio, Select, Switch } from 'ant-design-vue'
+import { computed, onBeforeUnmount, onMounted, ref } from 'vue'
+import { ColorPicker } from 'vue3-colorpicker'
+import 'vue3-colorpicker/style.css'
 
 import {
   WaveformChart,
   type WaveformAnnotation,
   type WaveformData,
   type WaveformDisplayMode,
+  type WaveformFrameStyle,
   type WaveformInteractionMode,
+  type WaveformLegendOrientation,
+  type WaveformLegendPosition,
   type WaveformSeries,
+  type WaveformTitleOptions,
 } from './components'
 import waveformJson from './data/wData.json'
 
@@ -35,18 +41,78 @@ const testChannelRows: WaveformSourceRow[] = importedSourceRows.slice(0, 2).map(
   ),
 }))
 const sourceRows = [...importedSourceRows, ...testChannelRows]
-const visibleRange = ref<[number, number] | null>(null)
 const displayMode = ref<WaveformDisplayMode>('independent')
 const rowCount = ref(2)
 const columnCount = ref(1)
+const frameBorderColor = ref('#1f2937')
+const frameBorderWidth = ref(1)
+const frameBorderStyle = ref<'solid' | 'dashed'>('solid')
+const frameBackgroundColor = ref('rgba(255, 255, 255, 0)')
+const frameWatermarkVisible = ref(true)
 const annotations = ref<WaveformAnnotation[]>([])
 const annotationsVisible = ref(true)
 const interactionMode = ref<WaveformInteractionMode>('zoom')
+const legendPosition = ref<WaveformLegendPosition>('top-right')
+const legendOrientation = ref<WaveformLegendOrientation>('auto')
+const legendBackgroundColor = ref('rgba(255, 255, 255, 0.7)')
+const titleVisible = ref(true)
+const titleText = ref(`Shot:${sourceRows[0]?.shot ?? 4712}`)
+const titleAlign = ref<NonNullable<WaveformTitleOptions['align']>>('center')
+const titleFontFamily = ref('"Microsoft YaHei", "微软雅黑", sans-serif')
+const titleFontSize = ref(14)
+const titleRotation = ref(0)
+const titleColor = ref('#1f2937')
+const titleBold = ref(false)
+const titleItalic = ref(false)
+const titleUnderline = ref(false)
+const controlsOpen = ref(false)
+const legendPositionOptions: Array<{ label: string; value: WaveformLegendPosition }> = [
+  { label: '左上', value: 'top-left' },
+  { label: '上', value: 'top' },
+  { label: '右上', value: 'top-right' },
+  { label: '右', value: 'right' },
+  { label: '右下', value: 'bottom-right' },
+  { label: '下', value: 'bottom' },
+  { label: '左下', value: 'bottom-left' },
+  { label: '左', value: 'left' },
+]
+const legendOrientationOptions: Array<{ label: string; value: WaveformLegendOrientation }> = [
+  { label: '自动', value: 'auto' },
+  { label: '水平', value: 'horizontal' },
+  { label: '垂直', value: 'vertical' },
+]
+const frameBorderStyleOptions = [
+  { label: '实线', value: 'solid' },
+  { label: '虚线', value: 'dashed' },
+]
+const titleAlignOptions: Array<{
+  label: string
+  value: NonNullable<WaveformTitleOptions['align']>
+}> = [
+  { label: '左对齐', value: 'left' },
+  { label: '居中', value: 'center' },
+  { label: '右对齐', value: 'right' },
+]
+const titleFontFamilyOptions = [
+  { label: '微软雅黑', value: '"Microsoft YaHei", "微软雅黑", sans-serif' },
+  { label: '宋体', value: 'SimSun, serif' },
+  { label: '黑体', value: 'SimHei, sans-serif' },
+  { label: 'Arial', value: 'Arial, sans-serif' },
+  { label: 'Consolas', value: 'Consolas, monospace' },
+]
+const frameStyle = computed<WaveformFrameStyle>(() => ({
+  borderColor: frameBorderColor.value,
+  borderWidth: frameBorderWidth.value,
+  borderStyle: frameBorderStyle.value,
+  backgroundColor: frameBackgroundColor.value,
+}))
 
 const waveformSeries: WaveformSeries[] = sourceRows.map((row) => {
   const pointCount = Math.min(row.time.length, row.data.length)
   return {
     id: String(row.chnl_id),
+    trackId:
+      row.chnl === 'TEST_CH_1' ? String(importedSourceRows[0]?.chnl_id ?? row.chnl_id) : undefined,
     name: row.chnl,
     unit: row.dat_unit,
     data: {
@@ -60,84 +126,315 @@ const waveformSeries: WaveformSeries[] = sourceRows.map((row) => {
 })
 
 const chartData: WaveformData = { kind: 'series', series: waveformSeries }
-const totalPointCount = waveformSeries.reduce((total, series) => {
-  const seriesPointCount =
-    series.data.kind === 'points' ? series.data.points.length : series.data.values.length
-  return total + seriesPointCount
-}, 0)
-const initialTimeRange: [number, number] = [
-  Math.min(...sourceRows.flatMap((row) => row.time)) / 1000,
-  Math.max(...sourceRows.flatMap((row) => row.time)) / 1000,
-]
-const displayedRange = computed(() => visibleRange.value ?? initialTimeRange)
-const formatMilliseconds = (seconds: number) =>
-  (seconds * 1000).toLocaleString('zh-CN', { maximumFractionDigits: 1 })
+const titleOptions = computed<WaveformTitleOptions>(() => ({
+  visible: titleVisible.value,
+  text: titleText.value,
+  align: titleAlign.value,
+  textStyle: {
+    color: titleColor.value,
+    fontSize: titleFontSize.value,
+    fontFamily: titleFontFamily.value,
+    rotation: titleRotation.value,
+    fontWeight: titleBold.value ? 700 : 400,
+    fontStyle: titleItalic.value ? 'italic' : 'normal',
+    textDecoration: titleUnderline.value ? 'underline' : 'none',
+  },
+}))
+function closeControls() {
+  controlsOpen.value = false
+}
 
-watch(displayMode, () => {
-  visibleRange.value = null
-})
+function resetTitleTextStyle() {
+  titleBold.value = false
+  titleItalic.value = false
+  titleUnderline.value = false
+}
 
-watch([rowCount, columnCount], () => {
-  visibleRange.value = null
-})
+function handleWindowKeydown(event: KeyboardEvent) {
+  if (event.key === 'Escape') closeControls()
+}
+
+onMounted(() => window.addEventListener('keydown', handleWindowKeydown))
+onBeforeUnmount(() => window.removeEventListener('keydown', handleWindowKeydown))
 </script>
 
 <template>
   <main class="workspace">
-    <header class="workspace__header">
-      <div>
-        <p class="workspace__eyebrow">Vue 3 · TypeScript · D3</p>
-        <h1>波形分析组件</h1>
-      </div>
-    </header>
+    <Button
+      class="mobile-control-toggle"
+      size="small"
+      :aria-expanded="controlsOpen"
+      aria-controls="waveform-control-panel"
+      @click="controlsOpen = true"
+    >
+      控制面板
+    </Button>
 
-    <section class="control-bar" aria-label="波形图控制与摘要">
-      <div class="control-bar__leading">
-        <Tag color="blue">真实 + 测试数据</Tag>
-        <Radio.Group
-          v-model:value="displayMode"
-          class="display-mode-control"
-          button-style="solid"
-          size="small"
-          aria-label="波形展示方式"
-        >
-          <Radio.Button value="independent">单独坐标</Radio.Button>
-          <Radio.Button value="separated">多道分离</Radio.Button>
-          <Radio.Button value="compact">多道紧凑</Radio.Button>
-        </Radio.Group>
-        <div class="grid-size-control" aria-label="波形网格尺寸">
-          <span>网格</span>
-          <InputNumber v-model:value="rowCount" :min="1" :max="10" size="small" />
-          <span>行 ×</span>
-          <InputNumber v-model:value="columnCount" :min="1" :max="10" size="small" />
-          <span>列</span>
-        </div>
+    <button
+      v-if="controlsOpen"
+      type="button"
+      class="control-backdrop"
+      aria-label="关闭控制面板"
+      @click="closeControls"
+    />
+
+    <aside
+      id="waveform-control-panel"
+      class="control-panel"
+      :class="{ 'is-open': controlsOpen }"
+      aria-label="波形图控制"
+    >
+      <div class="control-panel__scroll">
+        <Button class="control-panel__close" type="text" size="small" @click="closeControls">
+          关闭
+        </Button>
+
+        <section class="control-section">
+          <h2>显示方式</h2>
+          <Radio.Group
+            v-model:value="displayMode"
+            class="display-mode-control"
+            button-style="solid"
+            size="small"
+            aria-label="波形展示方式"
+          >
+            <Radio.Button value="independent">单独坐标</Radio.Button>
+            <Radio.Button value="separated">多道分离</Radio.Button>
+            <Radio.Button value="compact">多道紧凑</Radio.Button>
+          </Radio.Group>
+        </section>
+
+        <section class="control-section">
+          <h2>图框布局</h2>
+          <div class="grid-size-control" aria-label="波形网格尺寸">
+            <InputNumber v-model:value="rowCount" :min="1" :max="10" size="small" />
+            <span>行</span>
+            <span class="control-separator">×</span>
+            <InputNumber v-model:value="columnCount" :min="1" :max="10" size="small" />
+            <span>列</span>
+          </div>
+        </section>
+
+        <section class="control-section">
+          <h2>图框样式</h2>
+          <div class="frame-style-controls">
+            <label class="frame-style-control">
+              <span>边框颜色</span>
+              <ColorPicker
+                v-model:pure-color="frameBorderColor"
+                aria-label="图框边框颜色"
+                use-type="pure"
+                picker-type="chrome"
+                format="rgb"
+                :disable-alpha="false"
+                :blur-close="true"
+              />
+            </label>
+            <label class="frame-style-control">
+              <span>背景颜色</span>
+              <ColorPicker
+                v-model:pure-color="frameBackgroundColor"
+                aria-label="图框背景颜色"
+                use-type="pure"
+                picker-type="chrome"
+                format="rgb"
+                :disable-alpha="false"
+                :blur-close="true"
+              />
+            </label>
+            <label class="frame-style-control">
+              <span>线宽</span>
+              <InputNumber
+                v-model:value="frameBorderWidth"
+                :min="0"
+                :max="10"
+                :step="0.5"
+                size="small"
+                aria-label="图框线宽"
+              />
+            </label>
+            <label class="frame-style-control">
+              <span>线型</span>
+              <Select
+                v-model:value="frameBorderStyle"
+                :options="frameBorderStyleOptions"
+                size="small"
+                aria-label="图框线型"
+              />
+            </label>
+            <label class="frame-style-control frame-style-control--switch">
+              <span>水印</span>
+              <Switch
+                v-model:checked="frameWatermarkVisible"
+                size="small"
+                aria-label="显示图框水印"
+              />
+            </label>
+          </div>
+        </section>
+
+        <section class="control-section title-control-section">
+          <div class="control-section__header">
+            <h2>标题</h2>
+            <Switch v-model:checked="titleVisible" size="small" aria-label="显示标题" />
+          </div>
+
+          <div class="title-controls">
+            <label class="title-control title-control--wide">
+              <span>标题名称</span>
+              <Input v-model:value="titleText" size="small" aria-label="标题名称" />
+            </label>
+            <label class="title-control title-control--wide">
+              <span>对齐方式</span>
+              <Select
+                v-model:value="titleAlign"
+                :options="titleAlignOptions"
+                size="small"
+                aria-label="标题对齐方式"
+              />
+            </label>
+            <label class="title-control">
+              <span>字体</span>
+              <Select
+                v-model:value="titleFontFamily"
+                :options="titleFontFamilyOptions"
+                size="small"
+                aria-label="标题字体"
+              />
+            </label>
+            <label class="title-control">
+              <span>字号</span>
+              <InputNumber
+                v-model:value="titleFontSize"
+                :min="8"
+                :max="72"
+                :step="1"
+                size="small"
+                aria-label="标题字号"
+              />
+            </label>
+            <div class="title-control">
+              <span>字体样式</span>
+              <div class="title-style-controls" role="group" aria-label="标题字体样式">
+                <button
+                  type="button"
+                  aria-label="恢复标题常规样式"
+                  title="恢复常规样式"
+                  @click="resetTitleTextStyle"
+                >
+                  A
+                </button>
+                <button
+                  type="button"
+                  :class="{ 'is-active': titleBold }"
+                  :aria-pressed="titleBold"
+                  aria-label="标题粗体"
+                  title="粗体"
+                  @click="titleBold = !titleBold"
+                >
+                  <b>B</b>
+                </button>
+                <button
+                  type="button"
+                  :class="{ 'is-active': titleItalic }"
+                  :aria-pressed="titleItalic"
+                  aria-label="标题斜体"
+                  title="斜体"
+                  @click="titleItalic = !titleItalic"
+                >
+                  <i>I</i>
+                </button>
+                <button
+                  type="button"
+                  :class="{ 'is-active': titleUnderline }"
+                  :aria-pressed="titleUnderline"
+                  aria-label="标题下划线"
+                  title="下划线"
+                  @click="titleUnderline = !titleUnderline"
+                >
+                  <u>U</u>
+                </button>
+              </div>
+            </div>
+            <label class="title-control">
+              <span>旋转</span>
+              <InputNumber
+                v-model:value="titleRotation"
+                :min="-180"
+                :max="180"
+                :step="1"
+                addon-after="°"
+                size="small"
+                aria-label="标题旋转角度"
+              />
+            </label>
+            <div class="title-control title-control--color">
+              <span>颜色</span>
+              <ColorPicker
+                v-model:pure-color="titleColor"
+                aria-label="标题颜色"
+                use-type="pure"
+                picker-type="chrome"
+                format="hex"
+                :disable-alpha="true"
+                :blur-close="true"
+              />
+            </div>
+          </div>
+        </section>
+
+        <section class="control-section">
+          <h2>图例</h2>
+          <label class="select-control">
+            <span>位置</span>
+            <Select
+              v-model:value="legendPosition"
+              :options="legendPositionOptions"
+              size="small"
+              aria-label="图例位置"
+            />
+          </label>
+          <label class="select-control">
+            <span>排列</span>
+            <Select
+              v-model:value="legendOrientation"
+              :options="legendOrientationOptions"
+              size="small"
+              aria-label="图例排列"
+            />
+          </label>
+          <label class="legend-color-control">
+            <span>背景</span>
+            <ColorPicker
+              v-model:pure-color="legendBackgroundColor"
+              aria-label="图例背景颜色"
+              use-type="pure"
+              picker-type="chrome"
+              format="rgb"
+              :disable-alpha="false"
+              :blur-close="true"
+            />
+          </label>
+        </section>
       </div>
-      <div class="metrics">
-        <span>{{ sourceRows.length }} 通道</span>
-        <span>{{ totalPointCount.toLocaleString() }} 数据点</span>
-        <span>{{ annotations.length }} 标注</span>
-        <span>炮号 {{ sourceRows[0]?.shot }}</span>
-        <span>设备 {{ sourceRows[0]?.dev }}</span>
-        <span>
-          范围 {{ formatMilliseconds(displayedRange[0]) }}–{{
-            formatMilliseconds(displayedRange[1])
-          }}
-          ms
-        </span>
-      </div>
-    </section>
+    </aside>
 
     <section class="chart-panel">
       <WaveformChart
         :data="chartData"
         :display-mode="displayMode"
         :grid="{ rowCount, columnCount, showPagination: true }"
-        :frame-number="1"
+        :title="titleOptions"
+        :legend="{
+          position: legendPosition,
+          orientation: legendOrientation,
+          backgroundColor: legendBackgroundColor,
+        }"
+        :frame-style="frameStyle"
+        :frame-number="frameWatermarkVisible ? 1 : undefined"
         v-model:annotations="annotations"
         v-model:annotations-visible="annotationsVisible"
         v-model:interaction-mode="interactionMode"
-        @zoom-change="visibleRange = $event"
       />
     </section>
   </main>
diff --git a/src/components/WaveformChart.test.ts b/src/components/WaveformChart.test.ts
index 541dd23..c2acc95 100644
--- a/src/components/WaveformChart.test.ts
+++ b/src/components/WaveformChart.test.ts
@@ -56,6 +56,7 @@ describe('normalizeWaveformData', () => {
         kind: 'series',
         series: [
           {
+            trackId: 'comparison-track',
             name: 'BT2_2M',
             unit: 'T',
             data: { kind: 'points', points: [{ x: 1, y: 2 }] },
@@ -69,6 +70,7 @@ describe('normalizeWaveformData', () => {
     ).toEqual([
       {
         id: 'series-0',
+        trackId: 'comparison-track',
         name: 'BT2_2M',
         unit: 'T',
         color: undefined,
@@ -128,6 +130,217 @@ describe('WaveformChart', () => {
     expect(wrapper.get('.ant-pagination-next').classes()).toContain('ant-pagination-disabled')
   })
 
+  it('overlays series with the same track ID without changing the next frame', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'series',
+        series: [
+          {
+            id: 'primary',
+            trackId: 'frame-1',
+            name: 'BT2_2M',
+            data: {
+              kind: 'points',
+              points: [
+                { x: 0, y: 0 },
+                { x: 1, y: 1 },
+              ],
+            },
+          },
+          {
+            id: 'second-frame',
+            name: 'BT1_2M',
+            data: {
+              kind: 'points',
+              points: [
+                { x: 0, y: 2 },
+                { x: 1, y: 3 },
+              ],
+            },
+          },
+          {
+            id: 'comparison',
+            trackId: 'frame-1',
+            name: 'TEST_CH_1',
+            data: {
+              kind: 'points',
+              points: [
+                { x: 0, y: 0.5 },
+                { x: 1, y: 1.5 },
+              ],
+            },
+          },
+        ],
+      },
+      { frameNumber: 1, grid: { rowCount: 2, columnCount: 1 } },
+    )
+
+    const tracks = wrapper.findAll('.waveform-chart__track')
+    expect(tracks).toHaveLength(2)
+    expect(
+      tracks[0].findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
+    ).toEqual(['primary', 'comparison'])
+    expect(
+      tracks[1].findAll('.waveform-chart__line').map((line) => line.attributes('data-series-id')),
+    ).toEqual(['second-frame'])
+    expect(tracks[0].find('.waveform-chart__y-axis-label').exists()).toBe(false)
+    expect(tracks[0].findAll('.waveform-chart__axis--y .tick').length).toBeGreaterThan(0)
+    expect(tracks[1].get('.waveform-chart__y-axis-label').text()).toBe('BT1_2M')
+    expect(tracks[1].find('.waveform-chart__legend').exists()).toBe(false)
+    const legend = tracks[0].get('.waveform-chart__legend')
+    expect(legend.attributes('data-position')).toBe('top-right')
+    expect(legend.attributes('data-orientation')).toBe('vertical')
+    expect(legend.get('.waveform-legend__panel').attributes('style')).toContain(
+      'background-color: rgba(255, 255, 255, 0.7)',
+    )
+    expect(legend.findAll('.waveform-chart__legend-item').map((item) => item.text())).toEqual([
+      'BT2_2M',
+      'TEST_CH_1',
+    ])
+    expect(
+      legend.findAll('.waveform-legend__swatch').map((swatch) => swatch.attributes('style')),
+    ).toEqual(['background-color: rgb(9, 96, 189);', 'background-color: rgb(56, 158, 13);'])
+    expect(wrapper.findAll('.waveform-chart__watermark').map((item) => item.text())).toEqual([
+      '1',
+      '2',
+    ])
+    expect(wrapper.find('.ant-pagination').exists()).toBe(false)
+
+    const firstTrackOverlay = tracks[0].get('.waveform-chart__overlay')
+    const overlayWidth = Number(firstTrackOverlay.attributes('width'))
+    const overlayHeight = Number(firstTrackOverlay.attributes('height'))
+    Object.defineProperty(firstTrackOverlay.element, 'getBoundingClientRect', {
+      value: () => ({ left: 0, top: 0, width: overlayWidth, height: overlayHeight }),
+    })
+    firstTrackOverlay.element.dispatchEvent(
+      new MouseEvent('pointermove', {
+        clientX: overlayWidth / 2,
+        clientY: overlayHeight / 2,
+        bubbles: true,
+      }),
+    )
+    await flushPromises()
+
+    const tooltipSeries = wrapper.findAll('.waveform-chart__tooltip-series')
+    expect(tooltipSeries).toHaveLength(2)
+    expect(tooltipSeries.map((item) => item.text())).toEqual([
+      expect.stringContaining('BT2_2M'),
+      expect.stringContaining('TEST_CH_1'),
+    ])
+  })
+
+  it('resolves automatic legend orientation and supports explicit overrides', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'series',
+        series: [
+          {
+            id: 'first',
+            trackId: 'shared',
+            name: 'first',
+            data: {
+              kind: 'points',
+              points: [
+                { x: 0, y: 0 },
+                { x: 1, y: 1 },
+              ],
+            },
+          },
+          {
+            id: 'second',
+            trackId: 'shared',
+            name: 'second',
+            data: {
+              kind: 'points',
+              points: [
+                { x: 0, y: 1 },
+                { x: 1, y: 2 },
+              ],
+            },
+          },
+        ],
+      },
+      { grid: { rowCount: 1, columnCount: 1 } },
+    )
+    const positions = [
+      'top-left',
+      'top',
+      'top-right',
+      'right',
+      'bottom-right',
+      'bottom',
+      'bottom-left',
+      'left',
+    ] as const
+
+    for (const position of positions) {
+      await wrapper.setProps({ legend: { position, orientation: 'auto' } })
+      const legend = wrapper.get('.waveform-chart__legend')
+      const expectedOrientation =
+        position === 'top' || position === 'bottom' ? 'horizontal' : 'vertical'
+      expect(legend.attributes('data-position')).toBe(position)
+      expect(legend.attributes('data-orientation')).toBe(expectedOrientation)
+      expect(legend.get('.waveform-legend__viewport').classes()).toContain(
+        `waveform-legend__viewport--${position}`,
+      )
+      expect(
+        legend
+          .get('.waveform-legend__panel')
+          .classes()
+          .includes('waveform-legend__panel--vertical'),
+      ).toBe(expectedOrientation === 'vertical')
+    }
+
+    await wrapper.setProps({ legend: { position: 'top', orientation: 'vertical' } })
+    expect(wrapper.get('.waveform-chart__legend').attributes('data-orientation')).toBe('vertical')
+    expect(wrapper.get('.waveform-legend__panel').classes()).toContain(
+      'waveform-legend__panel--vertical',
+    )
+
+    await wrapper.setProps({ legend: { position: 'left', orientation: 'horizontal' } })
+    expect(wrapper.get('.waveform-chart__legend').attributes('data-orientation')).toBe('horizontal')
+    expect(wrapper.get('.waveform-legend__panel').classes()).toContain(
+      'waveform-legend__panel--horizontal',
+    )
+
+    expect(wrapper.attributes('data-chart-left-margin')).toBe('64')
+  })
+
+  it('applies a configurable alpha background to every visible legend', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'series',
+        series: Array.from({ length: 4 }, (_, index) => ({
+          id: `series-${index}`,
+          trackId: `frame-${Math.floor(index / 2)}`,
+          name: `series ${index}`,
+          data: {
+            kind: 'points',
+            points: [
+              { x: 0, y: index },
+              { x: 1, y: index + 1 },
+            ],
+          },
+        })),
+      },
+      {
+        grid: { rowCount: 2, columnCount: 1 },
+        legend: { backgroundColor: 'rgba(14, 165, 233, 0.25)' },
+      },
+    )
+
+    const legendPanels = wrapper.findAll('.waveform-legend__panel')
+    expect(legendPanels).toHaveLength(2)
+    legendPanels.forEach((panel) => {
+      expect(panel.attributes('style')).toContain('background-color: rgba(14, 165, 233, 0.25)')
+    })
+
+    await wrapper.setProps({ legend: { backgroundColor: '' } })
+    wrapper.findAll('.waveform-legend__panel').forEach((panel) => {
+      expect(panel.attributes('style')).toContain('background-color: rgba(255, 255, 255, 0.7)')
+    })
+  })
+
   it('renders independent cells with separate x axes and overlays', async () => {
     const wrapper = await mountSizedChart(gridSeries(4), {
       displayMode: 'independent',
@@ -328,6 +541,7 @@ describe('WaveformChart', () => {
     expect(wrapper.findAll('.waveform-chart__axis--x')).toHaveLength(3)
     expect(wrapper.findAll('.waveform-chart__line')).toHaveLength(4)
     expect(emptyTracks[0].findAll('.waveform-chart__grid')).toHaveLength(0)
+    expect(emptyTracks[0].find('.waveform-chart__plot-background').exists()).toBe(false)
     expect(emptyTracks[0].find('.waveform-chart__plot-frame').exists()).toBe(false)
     expect(emptyTracks[0].find('.waveform-chart__axis--y').exists()).toBe(false)
     expect(emptyTracks[0].find('.waveform-chart__line').exists()).toBe(false)
@@ -487,6 +701,247 @@ describe('WaveformChart', () => {
     expect(wrapper.get('.waveform-chart__svg').attributes('height')).toBe('300')
   })
 
+  it('does not render or reserve space for missing, hidden, or blank titles', async () => {
+    for (const title of [undefined, { visible: false, text: '隐藏标题' }, { text: '   ' }]) {
+      const wrapper = await mountSizedChart(
+        { kind: 'samples', values: [0, 1], sampleRate: 1 },
+        title ? { title } : {},
+      )
+
+      expect(wrapper.find('.waveform-chart__title-area').exists()).toBe(false)
+      expect(wrapper.attributes('data-title-area-height')).toBe('0')
+      expect(wrapper.get('.waveform-chart__svg').attributes('height')).toBe('360')
+    }
+  })
+
+  it.each(['independent', 'separated', 'compact'] as const)(
+    'keeps the titled empty state inside the drawing area in %s mode',
+    async (displayMode) => {
+      const wrapper = await mountSizedChart(
+        { kind: 'samples', values: [1], sampleRate: -1 },
+        { displayMode, title: { text: '空数据标题' } },
+      )
+
+      expect(wrapper.get('.waveform-chart__title-text').text()).toBe('空数据标题')
+      expect(wrapper.get('.waveform-chart__svg').attributes('height')).toBe('316')
+      expect(wrapper.get('.waveform-chart__empty').attributes('y')).toBe('158')
+    },
+  )
+
+  it('renders one chart title with alignment and all supported text styles', async () => {
+    const wrapper = await mountSizedChart(
+      { kind: 'samples', values: [0, 1], sampleRate: 1 },
+      {
+        title: {
+          text: '  shot: #4712  ',
+          align: 'right',
+          textStyle: {
+            color: '#c026d3',
+            fontSize: 18,
+            fontFamily: 'Consolas',
+            rotation: 0,
+            fontWeight: 700,
+            fontStyle: 'italic',
+            textDecoration: 'underline',
+            letterSpacing: '2px',
+          },
+        },
+      },
+    )
+
+    const area = wrapper.get('.waveform-chart__title-area')
+    const visual = wrapper.get('.waveform-chart__title-visual')
+    const title = wrapper.get('.waveform-chart__title-text')
+    expect(area.attributes('role')).toBe('heading')
+    expect(area.attributes('style')).toContain('justify-content: flex-end')
+    expect(title.text()).toBe('shot: #4712')
+    expect(title.attributes('style')).toContain('color: rgb(192, 38, 211)')
+    expect(title.attributes('style')).toContain('font-size: 18px')
+    expect(title.attributes('style')).toContain('font-family: Consolas')
+    expect(title.attributes('style')).toContain('font-weight: 700')
+    expect(title.attributes('style')).toContain('font-style: italic')
+    expect(title.attributes('style')).toContain('text-decoration: underline')
+    expect(title.attributes('style')).toContain('letter-spacing: 2px')
+    expect(visual.attributes('style')).toContain('width: 752px')
+    expect(title.attributes('style')).toContain('width: 752px')
+    expect(title.attributes('style')).toContain('rotate(0deg)')
+    expect(wrapper.attributes('data-title-area-height')).toBe('44')
+    expect(wrapper.get('.waveform-chart__svg').attributes('height')).toBe('316')
+  })
+
+  it('normalizes invalid title numbers and wraps long titles at narrow widths', async () => {
+    const wrapper = await mountSizedChart(
+      { kind: 'samples', values: [0, 1], sampleRate: 1 },
+      {
+        title: {
+          text: '这是一个用于验证窄屏省略行为的很长波形分析标题',
+          textStyle: { fontSize: Number.NaN, rotation: Number.POSITIVE_INFINITY },
+        },
+      },
+    )
+    resizeObservers.at(-1)?.resize(160, 360)
+    await flushPromises()
+
+    const title = wrapper.get('.waveform-chart__title-text')
+    expect(title.attributes('style')).toContain('font-size: 14px')
+    expect(title.attributes('style')).toContain('Microsoft YaHei')
+    expect(title.attributes('style')).toContain('font-weight: 400')
+    expect(title.attributes('style')).toContain('rotate(0deg)')
+    expect(title.attributes('style')).toContain('white-space: normal')
+    expect(title.attributes('style')).toContain('overflow-wrap: anywhere')
+    expect(title.attributes('title')).toBeUndefined()
+    expect(title.attributes('data-title-wrapped')).toBe('true')
+    expect(Number(wrapper.attributes('data-title-area-height'))).toBeGreaterThan(44)
+  })
+
+  it.each([45, 90, -90, 180])(
+    'scales a complete long title into the rotated title area at %s degrees',
+    async (rotation) => {
+    const wrapper = await mountSizedChart(
+      { kind: 'samples', values: [0, 1], sampleRate: 1 },
+      {
+        title: {
+          text: '这是一个用于验证旋转缩放行为的完整波形分析标题',
+          textStyle: { rotation },
+        },
+      },
+    )
+    const titleHeight = Number(wrapper.attributes('data-title-area-height'))
+    const title = wrapper.get('.waveform-chart__title-text')
+
+    expect(titleHeight).toBeGreaterThanOrEqual(44)
+    expect(titleHeight).toBeLessThanOrEqual(160)
+    expect(Number(wrapper.get('.waveform-chart__svg').attributes('height'))).toBe(360 - titleHeight)
+    expect(title.text()).toBe('这是一个用于验证旋转缩放行为的完整波形分析标题')
+    expect(title.attributes('style')).toContain(`rotate(${rotation}deg)`)
+    expect(title.attributes('style')).toContain('white-space: nowrap')
+    expect(Number(title.attributes('data-title-scale'))).toBeLessThanOrEqual(1)
+    expect(title.attributes('data-title-wrapped')).toBeUndefined()
+    },
+  )
+
+  it('updates fixed and adaptive drawing heights when the title changes', async () => {
+    const fixedWrapper = mount(WaveformChart, {
+      props: {
+        data: { kind: 'samples', values: [0, 1], sampleRate: 1 },
+        height: 420,
+        title: { text: '固定高度标题' },
+      },
+    })
+    expect(fixedWrapper.get('.waveform-chart__svg').attributes('height')).toBe('376')
+
+    await fixedWrapper.setProps({ title: { visible: false, text: '固定高度标题' } })
+    expect(fixedWrapper.get('.waveform-chart__svg').attributes('height')).toBe('420')
+
+    const adaptiveWrapper = await mountSizedChart(
+      { kind: 'samples', values: [0, 1], sampleRate: 1 },
+      { title: { text: '自适应高度标题' } },
+    )
+    expect(adaptiveWrapper.get('.waveform-chart__svg').attributes('height')).toBe('316')
+    resizeObservers.at(-1)?.resize(800, 500)
+    await flushPromises()
+    expect(adaptiveWrapper.get('.waveform-chart__svg').attributes('height')).toBe('456')
+  })
+
+  it('includes the title offset in root-relative tooltip positioning', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 1, y: 5 },
+        ],
+      },
+      { title: { text: 'shot: #4712' }, grid: { rowCount: 1, columnCount: 1 } },
+    )
+    const overlay = wrapper.get('.waveform-chart__overlay')
+    const overlayWidth = Number(overlay.attributes('width'))
+    Object.defineProperty(overlay.element, 'getBoundingClientRect', {
+      value: () => ({ left: 0, top: 0, width: overlayWidth, height: 246 }),
+    })
+
+    overlay.element.dispatchEvent(
+      new MouseEvent('pointermove', { clientX: overlayWidth / 2, clientY: 100, bubbles: true }),
+    )
+    await flushPromises()
+
+    const tooltipTop = Number.parseFloat(
+      (wrapper.get('.waveform-chart__tooltip').element as HTMLElement).style.top,
+    )
+    expect(tooltipTop).toBeGreaterThanOrEqual(44)
+  })
+
+  it('includes the title offset in annotation editor anchors', async () => {
+    const wrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 1, y: 5 },
+        ],
+      },
+      { title: { text: 'shot: #4712' }, grid: { rowCount: 1, columnCount: 1 } },
+    )
+    const overlay = wrapper.get('.waveform-chart__overlay')
+    const overlayWidth = Number(overlay.attributes('width'))
+    Object.defineProperty(overlay.element, 'getBoundingClientRect', {
+      value: () => ({ left: 0, top: 0, width: overlayWidth, height: 246 }),
+    })
+    overlay.element.dispatchEvent(
+      new MouseEvent('contextmenu', {
+        clientX: overlayWidth / 2,
+        clientY: 100,
+        bubbles: true,
+      }),
+    )
+    await flushPromises()
+
+    const component = wrapper.vm as typeof wrapper.vm & {
+      annotationInteraction: {
+        editorDraft: {
+          value: { anchor: { x: number; y: number } } | null
+        }
+      }
+    }
+    expect(component.annotationInteraction.editorDraft.value?.anchor.y).toBe(162)
+  })
+
+  it('captures and suppresses descendant context menus across the waveform svg', async () => {
+    const wrapper = await mountSizedChart({
+      kind: 'points',
+      points: [
+        { x: 0, y: 0 },
+        { x: 1, y: 1 },
+      ],
+    })
+
+    for (const selector of ['.waveform-chart__grid', '.waveform-chart__overlay']) {
+      const event = new MouseEvent('contextmenu', { bubbles: true, cancelable: true })
+      const dispatched = wrapper.get(selector).element.dispatchEvent(event)
+
+      expect(dispatched).toBe(false)
+      expect(event.defaultPrevented).toBe(true)
+    }
+
+    const sharedWrapper = await mountSizedChart(
+      {
+        kind: 'points',
+        points: [
+          { x: 0, y: 0 },
+          { x: 1, y: 1 },
+        ],
+      },
+      { displayMode: 'separated' },
+    )
+    const sharedEvent = new MouseEvent('contextmenu', { bubbles: true, cancelable: true })
+    const sharedDispatched = sharedWrapper
+      .get('.waveform-chart__overlay--shared')
+      .element.dispatchEvent(sharedEvent)
+
+    expect(sharedDispatched).toBe(false)
+    expect(sharedEvent.defaultPrevented).toBe(true)
+  })
+
   it('applies size fallbacks for minimum, negative, and non-finite values', async () => {
     const minimumWrapper = mount(WaveformChart, {
       props: {
@@ -588,10 +1043,66 @@ describe('WaveformChart', () => {
     expect(wrapper.findAll('.waveform-chart__grid--major line').length).toBeGreaterThan(0)
     expect(wrapper.findAll('.waveform-chart__grid--minor line').length).toBeGreaterThan(0)
     expect(wrapper.find('.waveform-chart__plot-frame').exists()).toBe(true)
+    expect(wrapper.get('.waveform-chart__plot-frame').attributes()).toMatchObject({
+      fill: 'none',
+      stroke: '#1f2937',
+      'stroke-width': '1',
+    })
+    expect(
+      wrapper.get('.waveform-chart__plot-frame').attributes('stroke-dasharray'),
+    ).toBeUndefined()
+    expect(wrapper.get('.waveform-chart__plot-background').attributes('fill')).toBe('transparent')
     expect(wrapper.get('.waveform-chart__watermark').text()).toBe('12')
     expect(wrapper.get('.waveform-chart__line').attributes('stroke')).toBe('#0960bd')
   })
 
+  it('applies one custom frame style to every non-empty track', async () => {
+    const wrapper = await mountSizedChart(gridSeries(2), {
+      grid: { rowCount: 2, columnCount: 1 },
+      frameStyle: {
+        borderColor: 'rgba(255, 0, 0, 0.7)',
+        borderWidth: 2.5,
+        borderStyle: 'dashed',
+        backgroundColor: 'rgba(16, 185, 129, 0.2)',
+      },
+    })
+
+    const tracks = wrapper.findAll('.waveform-chart__track')
+    const frames = wrapper.findAll('.waveform-chart__plot-frame')
+    const backgrounds = wrapper.findAll('.waveform-chart__plot-background')
+
+    expect(frames).toHaveLength(2)
+    expect(backgrounds).toHaveLength(2)
+    frames.forEach((frame) => {
+      expect(frame.attributes()).toMatchObject({
+        stroke: 'rgba(255, 0, 0, 0.7)',
+        'stroke-width': '2.5',
+        'stroke-dasharray': '6 4',
+      })
+    })
+    backgrounds.forEach((background) => {
+      expect(background.attributes('fill')).toBe('rgba(16, 185, 129, 0.2)')
+    })
+
+    tracks.forEach((track) => {
+      const renderingLayers = track.findAll(
+        '.waveform-chart__plot-background, .waveform-chart__grid',
+      )
+      expect(renderingLayers[0].classes()).toContain('waveform-chart__plot-background')
+    })
+  })
+
+  it('falls back to the default width for invalid frame widths', async () => {
+    const wrapper = await mountSizedChart(gridSeries(1), {
+      frameStyle: { borderWidth: -1 },
+    })
+
+    expect(wrapper.get('.waveform-chart__plot-frame').attributes('stroke-width')).toBe('1')
+
+    await wrapper.setProps({ frameStyle: { borderWidth: Number.NaN } })
+    expect(wrapper.get('.waveform-chart__plot-frame').attributes('stroke-width')).toBe('1')
+  })
+
   it('continues minor x-grid lines beyond the final major tick to the exact endpoint', async () => {
     const wrapper = await mountSizedChart({
       kind: 'points',
@@ -1467,7 +1978,14 @@ describe('WaveformChart', () => {
     expect(wrapper.find('.waveform-annotation-editor').exists()).toBe(true)
     expect(wrapper.get('.waveform-annotation-editor').attributes('aria-modal')).toBe('true')
     expect(wrapper.find('.waveform-annotation-editor__panel').exists()).toBe(true)
-    await wrapper.get('textarea[aria-label="标注文本"]').setValue('右键标注')
+    const textarea = wrapper.get('textarea[aria-label="标注文本"]')
+    const textareaContextMenu = new MouseEvent('contextmenu', {
+      bubbles: true,
+      cancelable: true,
+    })
+    expect(textarea.element.dispatchEvent(textareaContextMenu)).toBe(true)
+    expect(textareaContextMenu.defaultPrevented).toBe(false)
+    await textarea.setValue('右键标注')
     await wrapper.get('.waveform-annotation-editor button.is-primary').trigger('click')
 
     expect(wrapper.emitted('update:annotations')?.at(-1)?.[0]).toMatchObject([
diff --git a/src/components/WaveformChart.vue b/src/components/WaveformChart.vue
index c19e85f..eb8287f 100644
--- a/src/components/WaveformChart.vue
+++ b/src/components/WaveformChart.vue
@@ -13,15 +13,30 @@ import {
 } from 'd3'
 import { resolveWaveformRenderingOptions } from '../core'
 import { formatScientificYAxisLabel, paddedDomain } from '../utils'
-import { computed, nextTick, onBeforeUnmount, onMounted, ref, shallowRef, useId, watch } from 'vue'
+import {
+  computed,
+  nextTick,
+  onBeforeUnmount,
+  onMounted,
+  ref,
+  shallowRef,
+  useId,
+  watch,
+  type CSSProperties,
+} from 'vue'
 
 import {
   type WaveformAnnotation,
   type WaveformData,
   type WaveformDisplayMode,
+  type WaveformFrameStyle,
   type WaveformInteractionMode,
+  type WaveformLegendOptions,
+  type WaveformLegendOrientation,
+  type WaveformLegendPosition,
   type WaveformPoint,
   type WaveformRenderingOptions,
+  type WaveformTitleOptions,
 } from './data/types'
 import {
   ANNOTATION_AMBIGUITY_DISTANCE,
@@ -56,8 +71,9 @@ import {
   X_AXIS_BAND,
   type WaveformGridOptions,
 } from './core/grid'
-import type { DisplaySeries, HoveredSeriesPoint, TrackLayout } from './core/types'
+import type { DisplaySeries, DisplayTrack, HoveredSeriesPoint, TrackLayout } from './core/types'
 import { buildTrackLayouts } from './core/layout'
+import { calculateRotatedTitleLayout, TITLE_AREA_HORIZONTAL_PADDING } from './core/title'
 import { usePreparedWaveformSeries } from './core/useWaveformData'
 import WaveformAnnotationEditor from './annotation/WaveformAnnotationEditor.vue'
 
@@ -74,12 +90,15 @@ const props = withDefaults(
     zoomable?: boolean
     timeUnit?: 's' | 'ms'
     frameNumber?: string | number
+    frameStyle?: WaveformFrameStyle
     annotations?: WaveformAnnotation[]
     annotationsVisible?: boolean
     interactionMode?: WaveformInteractionMode
     showAnnotationToolbar?: boolean
     grid?: WaveformGridOptions
     rendering?: WaveformRenderingOptions
+    title?: WaveformTitleOptions
+    legend?: WaveformLegendOptions
   }>(),
   {
     displayMode: 'independent',
@@ -95,6 +114,7 @@ const props = withDefaults(
     showAnnotationToolbar: false,
     grid: () => ({ rowCount: 2, columnCount: 1, showPagination: true }),
     rendering: () => ({}),
+    legend: () => ({ position: 'top-right', orientation: 'auto' }),
   },
 )
 
@@ -114,9 +134,12 @@ const margin = chartMargin
 const minimumHeight = chartMinimumHeight
 const container = ref<HTMLDivElement>()
 const svgElement = ref<SVGSVGElement>()
+const titleMeasureElement = ref<HTMLSpanElement>()
 const sharedOverlayElement = ref<SVGRectElement>()
 const observedWidth = ref(0)
 const observedHeight = ref(0)
+const measuredTitleWidth = ref(0)
+const measuredTitleHeight = ref(0)
 const sharedTransform = shallowRef<ZoomTransform>(zoomIdentity)
 const independentTransforms = shallowRef<ZoomTransform[]>([])
 const hoveredSeriesPoints = ref<HoveredSeriesPoint[]>([])
@@ -158,7 +181,95 @@ const containerStyle = computed(() => ({
   width: fixedWidth.value === undefined ? '100%' : `${fixedWidth.value}px`,
   height: fixedHeight.value === undefined ? '100%' : `${fixedHeight.value}px`,
 }))
-const innerHeight = computed(() => Math.max(0, chartHeight.value - margin.top - margin.bottom))
+const legendPosition = computed<WaveformLegendPosition>(() => props.legend?.position ?? 'top-right')
+const legendBackgroundColor = computed(
+  () => props.legend?.backgroundColor || 'rgba(255, 255, 255, 0.7)',
+)
+const legendOrientation = computed<Exclude<WaveformLegendOrientation, 'auto'>>(() => {
+  const orientation = props.legend?.orientation ?? 'auto'
+  if (orientation !== 'auto') return orientation
+  return legendPosition.value === 'top' || legendPosition.value === 'bottom'
+    ? 'horizontal'
+    : 'vertical'
+})
+const resolvedTitleText = computed(() => props.title?.text.trim() ?? '')
+const titleVisible = computed(
+  () =>
+    Boolean(props.title) && props.title?.visible !== false && resolvedTitleText.value.length > 0,
+)
+const titleFontSize = computed(() => {
+  const fontSize = props.title?.textStyle?.fontSize
+  return Number.isFinite(fontSize) && (fontSize ?? 0) > 0 ? (fontSize as number) : 14
+})
+const titleRotation = computed(() => {
+  const rotation = props.title?.textStyle?.rotation
+  return Number.isFinite(rotation) ? (rotation as number) : 0
+})
+const titleIsRotated = computed(() => {
+  const normalizedRotation = ((titleRotation.value % 360) + 360) % 360
+  return normalizedRotation > 1e-6 && Math.abs(normalizedRotation - 360) > 1e-6
+})
+const titlePresentationStyle = computed<CSSProperties>(() => ({
+  color: props.title?.textStyle?.color ?? '#1f2937',
+  fontSize: `${titleFontSize.value}px`,
+  fontFamily: props.title?.textStyle?.fontFamily || '"Microsoft YaHei", "微软雅黑", sans-serif',
+  fontWeight: props.title?.textStyle?.fontWeight ?? 400,
+  fontStyle: props.title?.textStyle?.fontStyle ?? 'normal',
+  textDecoration: props.title?.textStyle?.textDecoration ?? 'none',
+  letterSpacing: props.title?.textStyle?.letterSpacing ?? 'normal',
+  lineHeight: '1.2',
+}))
+const estimatedTitleWidth = computed(() => {
+  const letterSpacing = Number.parseFloat(props.title?.textStyle?.letterSpacing ?? '')
+  const spacingWidth = Number.isFinite(letterSpacing)
+    ? Math.max(0, resolvedTitleText.value.length - 1) * letterSpacing
+    : 0
+  return Math.max(1, resolvedTitleText.value.length * titleFontSize.value * 0.62 + spacingWidth)
+})
+const titleAvailableWidth = computed(() => {
+  const measuredAvailableWidth = chartWidth.value - TITLE_AREA_HORIZONTAL_PADDING * 2
+  return measuredAvailableWidth > 0 ? measuredAvailableWidth : estimatedTitleWidth.value
+})
+const titleMeasureStyle = computed<CSSProperties>(() => ({
+  ...titlePresentationStyle.value,
+  width: 'max-content',
+  maxWidth: titleIsRotated.value ? 'none' : `${titleAvailableWidth.value}px`,
+  whiteSpace: titleIsRotated.value ? 'nowrap' : 'normal',
+  overflowWrap: titleIsRotated.value ? 'normal' : 'anywhere',
+}))
+const titleLayout = computed(() =>
+  calculateRotatedTitleLayout({
+    naturalWidth: measuredTitleWidth.value || estimatedTitleWidth.value,
+    naturalHeight: measuredTitleHeight.value || titleFontSize.value * 1.2,
+    availableWidth: titleAvailableWidth.value,
+    rotation: titleRotation.value,
+  }),
+)
+const titleAreaHeight = computed(() => (titleVisible.value ? titleLayout.value.areaHeight : 0))
+const drawingHeight = computed(() => Math.max(0, chartHeight.value - titleAreaHeight.value))
+const innerHeight = computed(() => Math.max(0, drawingHeight.value - margin.top - margin.bottom))
+const titleAreaStyle = computed<CSSProperties>(() => ({
+  height: `${titleAreaHeight.value}px`,
+  justifyContent:
+    props.title?.align === 'left'
+      ? 'flex-start'
+      : props.title?.align === 'right'
+        ? 'flex-end'
+        : 'center',
+}))
+const titleVisualStyle = computed<CSSProperties>(() => ({
+  width: `${titleLayout.value.visualWidth}px`,
+  height: `${titleLayout.value.visualHeight}px`,
+}))
+const titleTextStyle = computed<CSSProperties>(() => ({
+  ...titlePresentationStyle.value,
+  width: `${titleLayout.value.textWidth}px`,
+  minHeight: `${titleLayout.value.textHeight}px`,
+  textAlign: props.title?.align ?? 'center',
+  whiteSpace: titleIsRotated.value ? 'nowrap' : 'normal',
+  overflowWrap: titleIsRotated.value ? 'normal' : 'anywhere',
+  transform: `translate(-50%, -50%) rotate(${titleRotation.value}deg) scale(${titleLayout.value.scale})`,
+}))
 const chartSeries = computed<DisplaySeries[]>(() =>
   preparedSeries.value.map((series, index: number): DisplaySeries => ({
     ...series,
@@ -166,11 +277,26 @@ const chartSeries = computed<DisplaySeries[]>(() =>
       series.color ?? (index === 0 ? props.lineColor : channelColors[index % channelColors.length]),
   })),
 )
+const chartTracks = computed<DisplayTrack[]>(() => {
+  const groupedSeries = new Map<string, DisplaySeries[]>()
+  chartSeries.value.forEach((series) => {
+    const trackId = series.trackId || series.id
+    const trackSeries = groupedSeries.get(trackId)
+    if (trackSeries) trackSeries.push(series)
+    else groupedSeries.set(trackId, [series])
+  })
+  return Array.from(groupedSeries, ([id, series]) => ({
+    id,
+    series,
+    xDomain: paddedDomain(series.flatMap((item) => item.xDomain)),
+    yDomain: paddedDomain(series.flatMap((item) => item.yDomain)),
+  }))
+})
 const gridOptions = computed(() => normalizeGridOptions(props.grid))
 const renderingOptions = computed(() => resolveWaveformRenderingOptions(props.rendering))
-const pageCount = computed(() => getPageCount(chartSeries.value.length, gridOptions.value))
-const pagedSeries = computed(() =>
-  paginateSeries(chartSeries.value, currentPage.value, gridOptions.value),
+const pageCount = computed(() => getPageCount(chartTracks.value.length, gridOptions.value))
+const pagedTracks = computed(() =>
+  paginateSeries(chartTracks.value, currentPage.value, gridOptions.value),
 )
 
 const yAxisCharacterWidth = 7
@@ -181,8 +307,8 @@ const yAxisLabelBandWidth = 24
 const minimumPlotWidth = 120
 
 const yAxisMetrics = computed(() => {
-  const formattedTickLabels = chartSeries.value.flatMap((series) => {
-    const scale = scaleLinear(series.yDomain, [1, 0]).nice()
+  const formattedTickLabels = chartTracks.value.flatMap((track) => {
+    const scale = scaleLinear(track.yDomain, [1, 0]).nice()
     const [axisMin, axisMax] = scale.domain()
     const values = scale.ticks(10)
     const topTickValue = values.reduce<number | undefined>((closestTick, tickValue) => {
@@ -205,7 +331,9 @@ const yAxisMetrics = computed(() => {
   return { tickClearance, fullClearance, labelCenterX }
 })
 const hasYAxisLabels = computed(() =>
-  chartSeries.value.some((series) => Boolean(series.name.trim() || props.yLabel)),
+  chartTracks.value.some(
+    (track) => track.series.length === 1 && Boolean(track.series[0]?.name.trim() || props.yLabel),
+  ),
 )
 const chartLeftMargin = computed(() =>
   Math.max(
@@ -261,7 +389,7 @@ const tooltipSeriesPoints = computed<TooltipSeriesPoint[]>(() => {
 })
 
 const sharedXDomain = computed(() =>
-  paddedDomain(chartSeries.value.flatMap((series) => series.xDomain)),
+  paddedDomain(chartTracks.value.flatMap((track) => track.xDomain)),
 )
 const sharedZoomDomain = computed(
   () =>
@@ -276,10 +404,10 @@ const gridCells = computed(() => {
     innerHeight.value,
     gridOptions.value,
     props.displayMode,
-    pagedSeries.value.map(Boolean),
+    pagedTracks.value.map(Boolean),
     yAxisLayout.value.horizontalGap,
   )
-  return cells.map((cell, index) => ({ ...cell, series: pagedSeries.value[index] }))
+  return cells.map((cell, index) => ({ ...cell, series: pagedTracks.value[index] }))
 })
 
 const trackLayouts = computed<TrackLayout[]>(() =>
@@ -297,11 +425,19 @@ const trackLayouts = computed<TrackLayout[]>(() =>
   }),
 )
 
+function annotationLayoutsForTrack(track: TrackLayout): AnnotationTrackLayout[] {
+  return track.seriesList.map((series) => ({ ...track, series }))
+}
+
+const annotationTrackLayouts = computed<AnnotationTrackLayout[]>(() =>
+  trackLayouts.value.flatMap(annotationLayoutsForTrack),
+)
+
 const renderedAnnotations = computed(() =>
   props.annotationsVisible
     ? layoutAnnotations(
         props.annotations,
-        trackLayouts.value as AnnotationTrackLayout[],
+        annotationTrackLayouts.value,
         innerWidth.value,
         innerHeight.value,
       )
@@ -324,7 +460,7 @@ const editorSeries = computed<AnnotationSeriesInfo | undefined>(() => {
 
 function resolveFrameNumber(trackIndex: number): string | number | undefined {
   if (props.frameNumber === undefined || props.frameNumber === null) return undefined
-  if (chartSeries.value.length === 1) return props.frameNumber
+  if (chartTracks.value.length === 1) return props.frameNumber
   return typeof props.frameNumber === 'number'
     ? props.frameNumber + trackIndex
     : `${props.frameNumber}-${trackIndex + 1}`
@@ -467,17 +603,21 @@ function resolvePointerEditorAnchor(
   const track = trackIndex === undefined ? undefined : trackLayouts.value[trackIndex]
   return {
     x: chartLeftMargin.value + (track ? track.left + pointerX : pointerX),
-    y: margin.top + (track ? track.top + pointerY : pointerY),
+    y: titleAreaHeight.value + margin.top + (track ? track.top + pointerY : pointerY),
   }
 }
 
 function resolveAnnotationEditorAnchor(annotation: WaveformAnnotation): AnnotationEditorAnchor {
-  const track = trackLayouts.value.find((item) => item.series.id === annotation.seriesId)
+  const track = trackLayouts.value.find((item) =>
+    item.seriesList.some((series) => series.id === annotation.seriesId),
+  )
   return {
     x: track
       ? chartLeftMargin.value + track.left + track.xScale(annotation.x)
       : chartWidth.value / 2,
-    y: track ? margin.top + track.top + track.yScale(annotation.y) : chartHeight.value / 2,
+    y: track
+      ? titleAreaHeight.value + margin.top + track.top + track.yScale(annotation.y)
+      : chartHeight.value / 2,
   }
 }
 
@@ -490,9 +630,10 @@ function beginCreate(
   editorSeriesOptions.value = candidates
   const draft = annotationInteraction.editorDraft.value
   const track = trackLayouts.value.find((item) => item.index === hit.trackIndex)
+  const series = track?.seriesList.find((item) => item.id === hit.seriesId)
   if (draft?.mode === 'add') {
     draft.annotation.style = {
-      borderColor: track?.series.color || '#1677ff',
+      borderColor: series?.color || '#1677ff',
       textColor: '#333333',
       backgroundColor: 'rgba(255, 255, 255, 0.92)',
     }
@@ -502,9 +643,12 @@ function beginCreate(
 function changeDraftSeries(seriesId: string) {
   const draft = annotationInteraction.editorDraft.value
   const candidate = editorSeriesOptions.value.find((item) => item.seriesId === seriesId)
-  const track = trackLayouts.value.find((item) => item.series.id === seriesId)
+  const track = trackLayouts.value.find((item) =>
+    item.seriesList.some((series) => series.id === seriesId),
+  )
+  const series = track?.seriesList.find((item) => item.id === seriesId)
   const point =
-    track && draft ? interpolateAnnotationPoint(track.series.points, draft.annotation.x) : null
+    series && draft ? interpolateAnnotationPoint(series.points, draft.annotation.x) : null
   if (!draft || !candidate || !track || !point) return
   draft.annotation = {
     ...draft.annotation,
@@ -569,7 +713,7 @@ function resolveAnnotationCandidates(
   const xValue = referenceTrack.xScale.invert(localPointerX)
   return {
     candidates: findAnnotationSeriesCandidates(
-      [referenceTrack] as AnnotationTrackLayout[],
+      annotationLayoutsForTrack(referenceTrack),
       xValue,
       localPointerX,
       sharedPointerY,
@@ -635,10 +779,12 @@ function editContextAnnotation() {
   const annotationId = context?.annotationId
   const annotation = props.annotations.find((item) => item.id === annotationId)
   if (annotation) {
-    const track = trackLayouts.value.find((item) => item.series.id === annotation.seriesId)
+    const track = trackLayouts.value.find((item) =>
+      item.seriesList.some((series) => series.id === annotation.seriesId),
+    )
     editorSeriesOptions.value = track
       ? findAnnotationSeriesCandidates(
-          [track] as AnnotationTrackLayout[],
+          annotationLayoutsForTrack(track),
           annotation.x,
           track.xScale(annotation.x),
           track.top + track.yScale(annotation.y),
@@ -685,14 +831,16 @@ function handleIndependentPointerMove(event: PointerEvent, trackIndex: number) {
   if (!overlay || !track) return
   const [pointerX, pointerY] = pointer(event, overlay)
   const xValue = track.xScale.invert(Math.max(0, Math.min(innerWidth.value, pointerX)))
-  const point = nearestPoint(track.series, xValue)
-  hoveredSeriesPoints.value = point ? [{ ...track.series, trackIndex, point }] : []
+  hoveredSeriesPoints.value = track.seriesList.flatMap((series) => {
+    const point = nearestPoint(series, xValue)
+    return point ? [{ ...series, trackIndex, point }] : []
+  })
   hoveredTrackIndex.value = trackIndex
   hoverPosition.value = {
     x: chartLeftMargin.value + track.left + pointerX,
-    y: margin.top + track.top + pointerY,
+    y: titleAreaHeight.value + margin.top + track.top + pointerY,
   }
-  emit('point-hover', point ?? null)
+  emit('point-hover', hoveredSeriesPoints.value[0]?.point ?? null)
 }
 
 function handleSharedPointerMove(event: PointerEvent) {
@@ -702,21 +850,23 @@ function handleSharedPointerMove(event: PointerEvent) {
   if (!referenceTrack) return
   const localPointerX = Math.max(0, Math.min(referenceTrack.width, pointerX - referenceTrack.left))
   const xValue = referenceTrack.xScale.invert(localPointerX)
-  hoveredSeriesPoints.value = trackLayouts.value.flatMap((track) => {
-    const point = nearestPoint(track.series, xValue)
-    return point ? [{ ...track.series, trackIndex: track.index, point }] : []
-  })
+  hoveredSeriesPoints.value = trackLayouts.value.flatMap((track) =>
+    track.seriesList.flatMap((series) => {
+      const point = nearestPoint(series, xValue)
+      return point ? [{ ...series, trackIndex: track.index, point }] : []
+    }),
+  )
   hoveredTrackIndex.value = null
   hoverPosition.value = {
     x: chartLeftMargin.value + pointerX,
-    y: margin.top + pointerY,
+    y: titleAreaHeight.value + margin.top + pointerY,
   }
   emit('point-hover', hoveredPoint.value)
 }
 
 function resetViewport() {
   sharedTransform.value = zoomIdentity
-  independentTransforms.value = chartSeries.value.map(() => zoomIdentity)
+  independentTransforms.value = chartTracks.value.map(() => zoomIdentity)
   clearHover()
   editorSeriesOptions.value = []
   void nextTick(configureZoom)
@@ -730,7 +880,7 @@ function goToPage(page: number) {
   annotationInteraction.closeContextMenu()
   cancelAnnotation()
   if (props.displayMode === 'independent') {
-    independentTransforms.value = pagedSeries.value.map(() => zoomIdentity)
+    independentTransforms.value = pagedTracks.value.map(() => zoomIdentity)
   }
   void nextTick(configureZoom)
   emit('page-change', nextPage, pageCount.value)
@@ -742,7 +892,7 @@ watch(
     innerHeight,
     () => props.zoomable,
     () => props.displayMode,
-    () => chartSeries.value.length,
+    () => chartTracks.value.length,
     () => currentPage.value,
     () => gridOptions.value.rowCount,
     () => gridOptions.value.columnCount,
@@ -815,11 +965,34 @@ watch(
   { deep: true },
 )
 
+function measureTitle() {
+  if (!titleVisible.value || !titleMeasureElement.value) {
+    measuredTitleWidth.value = 0
+    measuredTitleHeight.value = 0
+    return
+  }
+  const bounds = titleMeasureElement.value.getBoundingClientRect()
+  measuredTitleWidth.value = titleMeasureElement.value.scrollWidth || bounds.width
+  measuredTitleHeight.value = titleMeasureElement.value.scrollHeight || bounds.height
+}
+
+watch(
+  [resolvedTitleText, titleVisible, titleMeasureStyle],
+  async () => {
+    measuredTitleWidth.value = 0
+    measuredTitleHeight.value = 0
+    await nextTick()
+    measureTitle()
+  },
+  { immediate: true },
+)
+
 onMounted(() => {
   if (!container.value) return
   resizeObserver.value = new ResizeObserver(([entry]) => {
     observedWidth.value = Math.max(0, entry?.contentRect.width ?? 0)
     observedHeight.value = Math.max(0, entry?.contentRect.height ?? 0)
+    void nextTick(measureTitle)
   })
   resizeObserver.value.observe(container.value)
 })
@@ -843,14 +1016,43 @@ onBeforeUnmount(() => {
     :data-display-mode="displayMode"
     :data-interaction-mode="activeInteractionMode"
     :data-chart-left-margin="chartLeftMargin"
+    :data-title-area-height="titleAreaHeight"
   >
+    <div
+      v-if="titleVisible"
+      class="waveform-chart__title-area"
+      :style="titleAreaStyle"
+      role="heading"
+      aria-level="2"
+    >
+      <span
+        ref="titleMeasureElement"
+        class="waveform-chart__title-measure"
+        :style="titleMeasureStyle"
+        aria-hidden="true"
+      >
+        {{ resolvedTitleText }}
+      </span>
+      <span class="waveform-chart__title-visual" :style="titleVisualStyle">
+        <span
+          class="waveform-chart__title-text"
+          :style="titleTextStyle"
+          :data-title-scale="titleLayout.scale"
+          :data-title-wrapped="titleLayout.wrapped || undefined"
+        >
+          {{ resolvedTitleText }}
+        </span>
+      </span>
+    </div>
+
     <svg
       ref="svgElement"
       class="waveform-chart__svg"
       :width="chartWidth"
-      :height="chartHeight"
+      :height="drawingHeight"
       role="img"
       :aria-label="hasWaveformData ? '波形折线图' : '暂无波形数据'"
+      @contextmenu.capture.prevent
     >
       <defs>
         <clipPath
@@ -890,8 +1092,12 @@ onBeforeUnmount(() => {
           :display-mode="displayMode"
           :interaction-mode="activeInteractionMode"
           :frame-number="resolveFrameNumber(track.index)"
+          :frame-style="frameStyle"
           :time-unit="timeUnit"
           :y-label="yLabel"
+          :legend-position="legendPosition"
+          :legend-orientation="legendOrientation"
+          :legend-background-color="legendBackgroundColor"
           :hovered-point="hoveredSeriesPoints.find((p) => p.trackIndex === track.index)"
           @pointer-move="handleIndependentPointerMove($event, track.index)"
           @pointer-leave="clearHover"
@@ -936,7 +1142,7 @@ onBeforeUnmount(() => {
         v-if="hasChartArea && !hasWaveformData"
         class="waveform-chart__empty"
         :x="chartWidth / 2"
-        :y="chartHeight / 2"
+        :y="drawingHeight / 2"
         text-anchor="middle"
       >
         暂无有效波形数据
@@ -949,7 +1155,7 @@ onBeforeUnmount(() => {
       aria-label="波形分页"
       :current="currentPage"
       :page-size="getPageSize(gridOptions)"
-      :total="chartSeries.length"
+      :total="chartTracks.length"
       :show-size-changer="false"
       :show-quick-jumper="false"
       @change="goToPage"
@@ -1018,6 +1224,41 @@ onBeforeUnmount(() => {
   z-index: 2;
 }
 
+.waveform-chart__title-area {
+  position: relative;
+  display: flex;
+  width: 100%;
+  min-width: 0;
+  align-items: center;
+  padding: 0 24px;
+  overflow: hidden;
+  background: #fff;
+}
+
+.waveform-chart__title-measure {
+  position: absolute;
+  display: block;
+  visibility: hidden;
+  pointer-events: none;
+}
+
+.waveform-chart__title-visual {
+  position: relative;
+  flex: 0 0 auto;
+  min-width: 0;
+  overflow: visible;
+}
+
+.waveform-chart__title-text {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  display: block;
+  overflow: visible;
+  line-height: 1.2;
+  transform-origin: center;
+}
+
 .waveform-chart__pagination :deep(.ant-pagination-item),
 .waveform-chart__pagination :deep(.ant-pagination-prev .ant-pagination-item-link),
 .waveform-chart__pagination :deep(.ant-pagination-next .ant-pagination-item-link) {
diff --git a/src/components/annotation/WaveformAnnotationEditor.vue b/src/components/annotation/WaveformAnnotationEditor.vue
index cb046b9..ef7b1a0 100644
--- a/src/components/annotation/WaveformAnnotationEditor.vue
+++ b/src/components/annotation/WaveformAnnotationEditor.vue
@@ -457,7 +457,7 @@ function handleSeriesChange(event: Event) {
   display: flex;
   justify-content: flex-end;
   gap: 8px;
-  padding-top: 2px;
+  padding-top: 8px;
   border-top: 1px solid #eaecf0;
 }
 
diff --git a/src/components/annotation/components.test.ts b/src/components/annotation/components.test.ts
index 2b078d7..a78eded 100644
--- a/src/components/annotation/components.test.ts
+++ b/src/components/annotation/components.test.ts
@@ -1,5 +1,5 @@
 import { flushPromises, mount } from '@vue/test-utils'
-import { describe, expect, it } from 'vitest'
+import { describe, expect, it, vi } from 'vitest'
 import { ColorPicker } from 'vue3-colorpicker'
 
 import WaveformAnnotationContextMenu from './WaveformAnnotationContextMenu.vue'
@@ -77,8 +77,11 @@ describe('waveform annotation controls', () => {
     )
     expect(wrapper.get('.waveform-annotation-editor__coordinates').text()).toContain('Y2')
     expect(wrapper.get('button.is-primary').attributes('disabled')).toBeDefined()
+    await vi.waitFor(
+      () => expect(wrapper.findAllComponents(ColorPicker)).toHaveLength(3),
+      { timeout: 5000 },
+    )
     const colorPickers = wrapper.findAllComponents(ColorPicker)
-    expect(colorPickers).toHaveLength(3)
     expect(wrapper.findAll('.waveform-annotation-editor__color-field')).toHaveLength(3)
     expect(colorPickers.map((picker) => picker.props('pureColor'))).toEqual([
       '#1677ff',
@@ -153,6 +156,10 @@ describe('waveform annotation controls', () => {
       },
     })
     await flushPromises()
+    await vi.waitFor(
+      () => expect(wrapper.findAllComponents(ColorPicker)).toHaveLength(3),
+      { timeout: 5000 },
+    )
 
     expect(
       wrapper.findAllComponents(ColorPicker).map((picker) => picker.props('pureColor')),
diff --git a/src/components/core/layout.ts b/src/components/core/layout.ts
index a36af11..7f52e84 100644
--- a/src/components/core/layout.ts
+++ b/src/components/core/layout.ts
@@ -8,10 +8,10 @@ import {
   type GridCellGeometry,
   type NormalizedWaveformGridOptions,
 } from './grid'
-import type { DisplaySeries, TrackLayout } from './types'
+import type { DisplaySeries, DisplayTrack, TrackLayout } from './types'
 
 interface SeriesGridCell extends GridCellGeometry {
-  series?: DisplaySeries
+  series?: DisplayTrack
 }
 
 export interface BuildTrackLayoutsOptions {
@@ -34,7 +34,7 @@ export function buildTrackLayouts(options: BuildTrackLayoutsOptions): TrackLayou
   return visibleCells.flatMap((cell, index) => {
     const isEmpty = !cell.series
     if (isEmpty && (options.displayMode !== 'compact' || !options.showCompactEmptyTracks)) return []
-    const series: DisplaySeries = cell.series ?? {
+    const emptySeries: DisplaySeries = {
       id: `empty-grid-slot-${cell.slotIndex}`,
       name: '',
       color: 'transparent',
@@ -42,16 +42,23 @@ export function buildTrackLayouts(options: BuildTrackLayoutsOptions): TrackLayou
       xDomain: [0, 1],
       yDomain: [0, 1],
     }
+    const displayTrack: DisplayTrack = cell.series ?? {
+      id: emptySeries.id,
+      series: [emptySeries],
+      xDomain: emptySeries.xDomain,
+      yDomain: emptySeries.yDomain,
+    }
+    const series = displayTrack.series[0]
     const baseXScale =
       options.displayMode === 'independent'
-        ? scaleLinear(series.xDomain, [0, cell.width])
+        ? scaleLinear(displayTrack.xDomain, [0, cell.width])
         : scaleLinear(options.sharedZoomDomain, [0, cell.width])
     const transform =
       options.displayMode === 'independent'
         ? (options.independentTransforms[index] ?? zoomIdentity)
         : zoomIdentity
     const xScale = transform.rescaleX(baseXScale)
-    const yScale = scaleLinear(series.yDomain, [cell.plotHeight, 0]).nice()
+    const yScale = scaleLinear(displayTrack.yDomain, [cell.plotHeight, 0]).nice()
     const xMajorTicks = xScale.ticks(Math.max(2, Math.floor(cell.width / 100)))
     const yMajorTicks = yScale.ticks(Math.max(2, Math.floor(cell.plotHeight / 55)))
     const [yAxisStart, yAxisEnd] = yScale.domain()
@@ -73,16 +80,27 @@ export function buildTrackLayouts(options: BuildTrackLayoutsOptions): TrackLayou
       const position = xScale(tick)
       return position > leftClearance && position < cell.width - rightClearance
     })
-    const renderPoints = selectRenderablePoints(
-      series.points,
-      domain,
-      cell.width,
-      options.rendering,
-    )
+    const seriesPaths = displayTrack.series.map((trackSeries) => {
+      const renderPoints = selectRenderablePoints(
+        trackSeries.points,
+        domain,
+        cell.width,
+        options.rendering,
+      )
+      return {
+        series: trackSeries,
+        path: isEmpty
+          ? null
+          : line<WaveformPoint>()
+              .x((point) => xScale(point.x))
+              .y((point) => yScale(point.y))(renderPoints),
+      }
+    })
 
     return {
       index,
       series,
+      seriesList: displayTrack.series,
       isEmpty,
       column: cell.column,
       showYAxisLabel: !options.hideSecondaryLabels || cell.column === 0,
@@ -100,11 +118,8 @@ export function buildTrackLayouts(options: BuildTrackLayoutsOptions): TrackLayou
       yAxisTickValues,
       xAxisTickValues,
       endpointLabels,
-      path: isEmpty
-        ? null
-        : line<WaveformPoint>()
-            .x((point) => xScale(point.x))
-            .y((point) => yScale(point.y))(renderPoints),
+      path: seriesPaths[0]?.path ?? null,
+      seriesPaths,
       showXAxis:
         options.displayMode === 'independent' ||
         (options.displayMode === 'compact'
diff --git a/src/components/core/title.test.ts b/src/components/core/title.test.ts
new file mode 100644
index 0000000..808ee40
--- /dev/null
+++ b/src/components/core/title.test.ts
@@ -0,0 +1,76 @@
+import { describe, expect, it } from 'vitest'
+
+import { calculateRotatedTitleLayout, TITLE_AREA_MAX_HEIGHT, TITLE_AREA_MIN_HEIGHT } from './title'
+
+describe('calculateRotatedTitleLayout', () => {
+  it('reserves the available width for an unrotated title that fits', () => {
+    expect(
+      calculateRotatedTitleLayout({
+        naturalWidth: 200,
+        naturalHeight: 20,
+        availableWidth: 300,
+        rotation: 0,
+      }),
+    ).toEqual({
+      textWidth: 300,
+      textHeight: 20,
+      visualWidth: 300,
+      visualHeight: 20,
+      areaHeight: TITLE_AREA_MIN_HEIGHT,
+      scale: 1,
+      wrapped: false,
+    })
+  })
+
+  it.each([45, 90, -90, 180])('keeps a %s degree title inside the maximum area', (rotation) => {
+    const layout = calculateRotatedTitleLayout({
+      naturalWidth: 400,
+      naturalHeight: 20,
+      availableWidth: 600,
+      rotation,
+    })
+
+    expect(layout.areaHeight).toBeGreaterThanOrEqual(TITLE_AREA_MIN_HEIGHT)
+    expect(layout.areaHeight).toBeLessThanOrEqual(TITLE_AREA_MAX_HEIGHT)
+    expect(layout.visualHeight).toBeLessThanOrEqual(TITLE_AREA_MAX_HEIGHT)
+    expect(layout.textWidth).toBe(400)
+    expect(layout.scale).toBeLessThanOrEqual(1)
+    expect(layout.wrapped).toBe(false)
+  })
+
+  it('wraps an unrotated title to the available width without scaling', () => {
+    const layout = calculateRotatedTitleLayout({
+      naturalWidth: 1_000,
+      naturalHeight: 20,
+      availableWidth: 120,
+      rotation: 0,
+    })
+
+    expect(layout.textWidth).toBe(120)
+    expect(layout.textHeight).toBe(180)
+    expect(layout.visualWidth).toBe(120)
+    expect(layout.visualHeight).toBe(180)
+    expect(layout.areaHeight).toBe(198)
+    expect(layout.scale).toBe(1)
+    expect(layout.wrapped).toBe(true)
+  })
+
+  it('falls back safely for non-finite dimensions and rotation', () => {
+    const layout = calculateRotatedTitleLayout({
+      naturalWidth: Number.NaN,
+      naturalHeight: Number.POSITIVE_INFINITY,
+      availableWidth: Number.NaN,
+      rotation: Number.NaN,
+    })
+
+    expect(layout).toEqual({
+      textWidth: 1,
+      textHeight: 1,
+      visualWidth: 1,
+      visualHeight: 1,
+      areaHeight: TITLE_AREA_MIN_HEIGHT,
+      scale: 1,
+      wrapped: false,
+    })
+  })
+})
diff --git a/src/components/core/title.ts b/src/components/core/title.ts
new file mode 100644
index 0000000..797f885
--- /dev/null
+++ b/src/components/core/title.ts
@@ -0,0 +1,88 @@
+export const TITLE_AREA_MIN_HEIGHT = 44
+export const TITLE_AREA_MAX_HEIGHT = 160
+export const TITLE_AREA_HORIZONTAL_PADDING = 24
+export const TITLE_AREA_VERTICAL_PADDING = 18
+
+const TRIGONOMETRY_EPSILON = 1e-6
+
+export interface RotatedTitleLayout {
+  textWidth: number
+  textHeight: number
+  visualWidth: number
+  visualHeight: number
+  areaHeight: number
+  scale: number
+  wrapped: boolean
+}
+
+export interface RotatedTitleLayoutOptions {
+  naturalWidth: number
+  naturalHeight: number
+  availableWidth: number
+  rotation: number
+}
+
+function clampPositive(value: number): number {
+  return Number.isFinite(value) ? Math.max(1, value) : 1
+}
+
+export function calculateRotatedTitleLayout({
+  naturalWidth,
+  naturalHeight,
+  availableWidth,
+  rotation,
+}: RotatedTitleLayoutOptions): RotatedTitleLayout {
+  const safeNaturalWidth = clampPositive(naturalWidth)
+  const safeNaturalHeight = clampPositive(naturalHeight)
+  const safeAvailableWidth = clampPositive(availableWidth)
+  const safeRotation = Number.isFinite(rotation) ? rotation : 0
+  const radians = (safeRotation * Math.PI) / 180
+  const absoluteCosine = Math.abs(Math.cos(radians))
+  const absoluteSine = Math.abs(Math.sin(radians))
+  const normalizedRotation = ((safeRotation % 360) + 360) % 360
+  const isRotated =
+    normalizedRotation > TRIGONOMETRY_EPSILON &&
+    Math.abs(normalizedRotation - 360) > TRIGONOMETRY_EPSILON
+
+  if (!isRotated) {
+    const lineCount = Math.max(1, Math.ceil(safeNaturalWidth / safeAvailableWidth))
+    const textWidth = safeAvailableWidth
+    const textHeight = safeNaturalHeight * lineCount
+    return {
+      textWidth,
+      textHeight,
+      visualWidth: textWidth,
+      visualHeight: textHeight,
+      areaHeight: Math.max(TITLE_AREA_MIN_HEIGHT, textHeight + TITLE_AREA_VERTICAL_PADDING),
+      scale: 1,
+      wrapped: lineCount > 1,
+    }
+  }
+
+  const maximumVisualHeight = TITLE_AREA_MAX_HEIGHT - TITLE_AREA_VERTICAL_PADDING
+  const naturalVisualWidth =
+    safeNaturalWidth * absoluteCosine + safeNaturalHeight * absoluteSine
+  const naturalVisualHeight =
+    safeNaturalWidth * absoluteSine + safeNaturalHeight * absoluteCosine
+  const scale = Math.min(
+    1,
+    safeAvailableWidth / naturalVisualWidth,
+    maximumVisualHeight / naturalVisualHeight,
+  )
+  const visualWidth = naturalVisualWidth * scale
+  const visualHeight = naturalVisualHeight * scale
+  const areaHeight = Math.min(
+    TITLE_AREA_MAX_HEIGHT,
+    Math.max(TITLE_AREA_MIN_HEIGHT, visualHeight + TITLE_AREA_VERTICAL_PADDING),
+  )
+
+  return {
+    textWidth: safeNaturalWidth,
+    textHeight: safeNaturalHeight,
+    visualWidth,
+    visualHeight,
+    areaHeight,
+    scale,
+    wrapped: false,
+  }
+}
diff --git a/src/components/core/types.ts b/src/components/core/types.ts
index 4f62b50..7b749d0 100644
--- a/src/components/core/types.ts
+++ b/src/components/core/types.ts
@@ -6,6 +6,7 @@ import type { WaveformPoint } from '../../types'
  */
 export interface DisplaySeries {
   id: string
+  trackId?: string
   name: string
   unit?: string
   color: string
@@ -14,6 +15,18 @@ export interface DisplaySeries {
   yDomain: [number, number]
 }
 
+export interface DisplayTrack {
+  id: string
+  series: DisplaySeries[]
+  xDomain: [number, number]
+  yDomain: [number, number]
+}
+
+export interface TrackSeriesPath {
+  series: DisplaySeries
+  path: string | null
+}
+
 /**
  * 悬浮的系列点
  */
@@ -28,6 +41,7 @@ export interface HoveredSeriesPoint extends DisplaySeries {
 export interface TrackLayout {
   index: number
   series: DisplaySeries
+  seriesList: DisplaySeries[]
   isEmpty: boolean
   column: number
   showYAxisLabel: boolean
@@ -46,6 +60,7 @@ export interface TrackLayout {
   xAxisTickValues: number[]
   endpointLabels: { start: string; end: string }
   path: string | null
+  seriesPaths: TrackSeriesPath[]
   showXAxis: boolean
 }
 
diff --git a/src/components/core/useWaveformData.ts b/src/components/core/useWaveformData.ts
index dad41aa..50117ba 100644
--- a/src/components/core/useWaveformData.ts
+++ b/src/components/core/useWaveformData.ts
@@ -6,6 +6,7 @@ import { paddedDomain } from '../../utils'
 
 export interface PreparedWaveformSeries {
   id: string
+  trackId?: string
   name: string
   unit?: string
   color?: string
diff --git a/src/components/data/types.ts b/src/components/data/types.ts
index 00ab43c..37a8be9 100644
--- a/src/components/data/types.ts
+++ b/src/components/data/types.ts
@@ -11,6 +11,12 @@ export type {
   WaveformAnnotationStyle,
   WaveformAnnotation,
   WaveformRenderingOptions,
+  WaveformTitleTextStyle,
+  WaveformTitleOptions,
+  WaveformLegendPosition,
+  WaveformLegendOrientation,
+  WaveformLegendOptions,
+  WaveformFrameStyle,
   SingleWaveformData,
   WaveformSeries,
   WaveformData,
diff --git a/src/components/index.ts b/src/components/index.ts
index 18a6cea..20ece28 100644
--- a/src/components/index.ts
+++ b/src/components/index.ts
@@ -9,6 +9,12 @@ export type {
   WaveformAnnotationStyle,
   WaveformAnnotation,
   WaveformRenderingOptions,
+  WaveformTitleTextStyle,
+  WaveformTitleOptions,
+  WaveformLegendPosition,
+  WaveformLegendOrientation,
+  WaveformLegendOptions,
+  WaveformFrameStyle,
   WaveformPoint,
   WaveformSeries,
   WaveformGridOptions,
diff --git a/src/components/rendering/WaveformLegend.vue b/src/components/rendering/WaveformLegend.vue
new file mode 100644
index 0000000..8259ba8
--- /dev/null
+++ b/src/components/rendering/WaveformLegend.vue
@@ -0,0 +1,152 @@
+<script setup lang="ts">
+import type { WaveformLegendPosition } from '../../types'
+import type { DisplaySeries } from '../core/types'
+
+interface Props {
+  series: DisplaySeries[]
+  position: WaveformLegendPosition
+  orientation: 'horizontal' | 'vertical'
+  backgroundColor: string
+  width: number
+  height: number
+}
+
+defineProps<Props>()
+</script>
+
+<template>
+  <foreignObject
+    class="waveform-legend waveform-chart__legend"
+    x="0"
+    y="0"
+    :width="width"
+    :height="height"
+    :data-position="position"
+    :data-orientation="orientation"
+    aria-label="曲线图例"
+  >
+    <div
+      xmlns="http://www.w3.org/1999/xhtml"
+      class="waveform-legend__viewport"
+      :class="`waveform-legend__viewport--${position}`"
+    >
+      <div
+        class="waveform-legend__panel"
+        :class="`waveform-legend__panel--${orientation}`"
+        :style="{ backgroundColor }"
+        role="list"
+      >
+        <div
+          v-for="item in series"
+          :key="item.id"
+          class="waveform-legend__item waveform-chart__legend-item"
+          role="listitem"
+        >
+          <i class="waveform-legend__swatch" :style="{ backgroundColor: item.color }" />
+          <span class="waveform-legend__label" :title="item.name">{{ item.name }}</span>
+        </div>
+      </div>
+    </div>
+  </foreignObject>
+</template>
+
+<style scoped>
+.waveform-legend {
+  overflow: hidden;
+  pointer-events: none;
+}
+
+.waveform-legend__viewport {
+  box-sizing: border-box;
+  display: flex;
+  width: 100%;
+  height: 100%;
+  padding: 8px;
+  overflow: hidden;
+}
+
+.waveform-legend__viewport--top-left {
+  align-items: flex-start;
+  justify-content: flex-start;
+}
+
+.waveform-legend__viewport--top {
+  align-items: flex-start;
+  justify-content: center;
+}
+
+.waveform-legend__viewport--top-right {
+  align-items: flex-start;
+  justify-content: flex-end;
+}
+
+.waveform-legend__viewport--right {
+  align-items: center;
+  justify-content: flex-end;
+}
+
+.waveform-legend__viewport--bottom-right {
+  align-items: flex-end;
+  justify-content: flex-end;
+}
+
+.waveform-legend__viewport--bottom {
+  align-items: flex-end;
+  justify-content: center;
+}
+
+.waveform-legend__viewport--bottom-left {
+  align-items: flex-end;
+  justify-content: flex-start;
+}
+
+.waveform-legend__viewport--left {
+  align-items: center;
+  justify-content: flex-start;
+}
+
+.waveform-legend__panel {
+  display: flex;
+  flex: 0 1 auto;
+  gap: 5px 12px;
+  max-width: 100%;
+  max-height: 100%;
+  padding: 5px 7px;
+  overflow: hidden;
+  color: #344054;
+  font: 12px/1.35 sans-serif;
+  border: 1px solid rgb(208 213 221 / 90%);
+  border-radius: 4px;
+}
+
+.waveform-legend__panel--horizontal {
+  flex-flow: row wrap;
+  align-items: center;
+}
+
+.waveform-legend__panel--vertical {
+  flex-flow: column nowrap;
+  align-items: stretch;
+}
+
+.waveform-legend__item {
+  display: flex;
+  min-width: 0;
+  max-width: 160px;
+  align-items: center;
+  gap: 6px;
+  white-space: nowrap;
+}
+
+.waveform-legend__swatch {
+  flex: 0 0 18px;
+  width: 18px;
+  height: 2px;
+}
+
+.waveform-legend__label {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+</style>
diff --git a/src/components/rendering/WaveformTrack.vue b/src/components/rendering/WaveformTrack.vue
index 6114732..c861fd0 100644
--- a/src/components/rendering/WaveformTrack.vue
+++ b/src/components/rendering/WaveformTrack.vue
@@ -1,9 +1,15 @@
 <script setup lang="ts">
-import { nextTick, onMounted, ref, watch } from 'vue'
+import { computed, nextTick, onMounted, ref, watch } from 'vue'
 import { axisBottom, axisLeft, select } from 'd3'
 import { formatAxisTime, formatScientificYAxisLabel } from '../../utils'
-import type { WaveformDisplayMode, WaveformInteractionMode } from '../data/types'
+import type { WaveformFrameStyle } from '../../types'
+import type {
+  WaveformDisplayMode,
+  WaveformInteractionMode,
+  WaveformLegendPosition,
+} from '../data/types'
 import type { DisplaySeries, HoveredSeriesPoint, TrackLayout } from '../core/types'
+import WaveformLegend from './WaveformLegend.vue'
 
 interface Props {
   /** 轨道布局信息 */
@@ -22,12 +28,20 @@ interface Props {
   interactionMode?: WaveformInteractionMode
   /** 帧编号 */
   frameNumber?: string | number
+  /** 图框样式 */
+  frameStyle?: WaveformFrameStyle
   /** 时间单位 */
   timeUnit: 's' | 'ms'
   /** 悬浮点（用于显示十字线） */
   hoveredPoint?: HoveredSeriesPoint
   /** Y 轴标签回退值 */
   yLabel?: string
+  /** 多曲线图例位置 */
+  legendPosition?: WaveformLegendPosition
+  /** 多曲线图例排列方向 */
+  legendOrientation?: 'horizontal' | 'vertical'
+  /** 多曲线图例背景颜色 */
+  legendBackgroundColor?: string
 }
 
 interface Emits {
@@ -39,11 +53,26 @@ interface Emits {
 
 const props = withDefaults(defineProps<Props>(), {
   interactionMode: 'zoom',
+  legendPosition: 'top-right',
+  legendOrientation: 'vertical',
+  legendBackgroundColor: 'rgba(255, 255, 255, 0.7)',
 })
 const emit = defineEmits<Emits>()
 
 const xAxisElement = ref<SVGGElement>()
 const yAxisElement = ref<SVGGElement>()
+const resolvedFrameStyle = computed(() => {
+  const borderWidth = props.frameStyle?.borderWidth
+  return {
+    borderColor: props.frameStyle?.borderColor || '#1f2937',
+    borderWidth:
+      typeof borderWidth === 'number' && Number.isFinite(borderWidth) && borderWidth >= 0
+        ? borderWidth
+        : 1,
+    borderStyle: props.frameStyle?.borderStyle === 'dashed' ? 'dashed' : 'solid',
+    backgroundColor: props.frameStyle?.backgroundColor || 'transparent',
+  }
+})
 
 function resolveYAxisLabel(series: DisplaySeries): string {
   return series.name.trim() || props.yLabel || ''
@@ -155,6 +184,15 @@ watch(
     :data-track-height="track.height"
     :transform="`translate(${track.left ?? 0}, ${track.top})`"
   >
+    <rect
+      v-if="!track.isEmpty"
+      class="waveform-track__plot-background waveform-chart__plot-background"
+      :width="track.width ?? innerWidth"
+      :height="track.height"
+      :fill="resolvedFrameStyle.backgroundColor"
+      aria-hidden="true"
+    />
+
     <!-- 网格和背景 -->
     <g v-if="!track.isEmpty" :clip-path="`url(#${clipPathId}-${track.index})`" aria-hidden="true">
       <g
@@ -259,6 +297,7 @@ watch(
     <g
       v-if="
         !track.isEmpty &&
+        track.seriesList.length === 1 &&
         track.showYAxisLabel &&
         resolveYAxisLabel(track.series) &&
         shouldShowYAxisLabel(track.height, track.index)
@@ -289,18 +328,35 @@ watch(
       class="waveform-track__plot-frame waveform-chart__plot-frame"
       :width="track.width ?? innerWidth"
       :height="track.height"
+      fill="none"
+      :stroke="resolvedFrameStyle.borderColor"
+      :stroke-width="resolvedFrameStyle.borderWidth"
+      :stroke-dasharray="resolvedFrameStyle.borderStyle === 'dashed' ? '6 4' : undefined"
       aria-hidden="true"
     />
 
     <!-- 波形线 -->
-    <path
-      v-if="!track.isEmpty"
-      class="waveform-track__line waveform-chart__line"
-      :data-series-id="track.series.id"
-      :data-series-name="track.series.name || undefined"
-      :d="track.path ?? undefined"
-      :stroke="track.series.color"
-      :clip-path="`url(#${clipPathId}-${track.index})`"
+    <g v-if="!track.isEmpty" class="waveform-track__lines">
+      <path
+        v-for="seriesPath in track.seriesPaths"
+        :key="seriesPath.series.id"
+        class="waveform-track__line waveform-chart__line"
+        :data-series-id="seriesPath.series.id"
+        :data-series-name="seriesPath.series.name || undefined"
+        :d="seriesPath.path ?? undefined"
+        :stroke="seriesPath.series.color"
+        :clip-path="`url(#${clipPathId}-${track.index})`"
+      />
+    </g>
+
+    <WaveformLegend
+      v-if="!track.isEmpty && track.seriesList.length > 1"
+      :series="track.seriesList"
+      :position="legendPosition"
+      :orientation="legendOrientation"
+      :background-color="legendBackgroundColor"
+      :width="track.width ?? innerWidth"
+      :height="track.height"
     />
 
     <!-- 十字线 -->
@@ -372,9 +428,10 @@ watch(
 }
 
 .waveform-track__plot-frame {
-  fill: none;
-  stroke: #1f2937;
-  stroke-width: 1;
+  pointer-events: none;
+}
+
+.waveform-track__plot-background {
   pointer-events: none;
 }
 
diff --git a/src/components/rendering/index.ts b/src/components/rendering/index.ts
index b368088..9ee246c 100644
--- a/src/components/rendering/index.ts
+++ b/src/components/rendering/index.ts
@@ -1 +1,2 @@
 export { default as WaveformTrack } from './WaveformTrack.vue'
+export { default as WaveformLegend } from './WaveformLegend.vue'
diff --git a/src/components/waveform.ts b/src/components/waveform.ts
index 6ed42a8..5d46832 100644
--- a/src/components/waveform.ts
+++ b/src/components/waveform.ts
@@ -11,6 +11,9 @@ export type {
   WaveformAnnotationStyle,
   WaveformAnnotation,
   WaveformRenderingOptions,
+  WaveformTitleTextStyle,
+  WaveformTitleOptions,
+  WaveformFrameStyle,
   SingleWaveformData,
   WaveformSeries,
   WaveformData,
diff --git a/src/core/data.ts b/src/core/data.ts
index c906da9..fb5dc0f 100644
--- a/src/core/data.ts
+++ b/src/core/data.ts
@@ -49,6 +49,7 @@ export function normalizeWaveformSeries(data: WaveformData): NormalizedWaveformS
 
       return {
         id: uniqueId,
+        trackId: series.trackId?.trim() || undefined,
         name: series.name,
         unit: series.unit,
         color: series.color,
diff --git a/src/index.ts b/src/index.ts
index 8022ee8..dc8c0fa 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -15,6 +15,12 @@ export type {
   WaveformAnnotationStyle,
   WaveformAnnotation,
   WaveformRenderingOptions,
+  WaveformTitleTextStyle,
+  WaveformTitleOptions,
+  WaveformLegendPosition,
+  WaveformLegendOrientation,
+  WaveformLegendOptions,
+  WaveformFrameStyle,
   // 数据类型
   SingleWaveformData,
   WaveformSeries,
diff --git a/src/styles.css b/src/styles.css
index a2a3e63..d373001 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -17,115 +17,327 @@
   box-sizing: border-box;
 }
 
+html,
+body,
+#app {
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+}
+
 body {
   min-width: 320px;
-  min-height: 100vh;
   margin: 0;
 }
 
 .workspace {
-  width: min(1440px, 100%);
-  margin: 0 auto;
-  padding: 28px clamp(16px, 4vw, 56px) 48px;
+  display: grid;
+  grid-template-columns: 280px minmax(0, 1fr);
+  gap: 12px;
+  width: 100%;
+  height: 100vh;
+  height: 100dvh;
+  padding: 12px;
+  overflow: hidden;
 }
 
-.workspace__header {
-  display: flex;
-  align-items: flex-end;
-  justify-content: space-between;
-  gap: 24px;
-  margin-bottom: 24px;
-}
-
-.workspace__eyebrow {
-  margin: 0 0 6px;
-  color: #1677ff;
-  font-size: 12px;
-  font-weight: 700;
-  text-transform: uppercase;
-}
-
-h1,
-p {
-  margin-top: 0;
-}
-
-h1 {
-  margin-bottom: 0;
-  font-size: 28px;
-  font-weight: 650;
-}
-
-.control-bar {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  gap: 20px;
-  padding: 12px 16px;
+.control-panel {
+  min-width: 0;
+  min-height: 0;
+  overflow: hidden;
   background: #fff;
   border: 1px solid #e4e7ec;
-  border-bottom: 0;
+  border-radius: 6px;
 }
 
-.control-bar__leading {
+.control-panel__scroll {
+  height: 100%;
+  overflow-x: hidden;
+  overflow-y: auto;
+  scrollbar-width: thin;
+  scrollbar-color: #d0d5dd transparent;
+}
+
+.control-panel__scroll::-webkit-scrollbar {
+  width: 6px;
+}
+
+.control-panel__scroll::-webkit-scrollbar-thumb {
+  background: #d0d5dd;
+  border-radius: 3px;
+}
+
+.control-section {
+  padding: 16px 18px;
+  border-top: 1px solid #eaecf0;
+}
+
+.control-section h2 {
+  margin: 0 0 12px;
+  color: #344054;
+  font-size: 12px;
+  font-weight: 650;
+  letter-spacing: 0;
+}
+
+.control-section__header {
   display: flex;
-  flex: 0 0 auto;
-  gap: 12px;
+  gap: 10px;
   align-items: center;
+  justify-content: space-between;
+}
+
+.control-section__header h2 {
+  margin-bottom: 0;
 }
 
 .display-mode-control {
-  display: inline-flex;
+  display: flex;
+  width: 100%;
   white-space: nowrap;
 }
 
+.display-mode-control .ant-radio-button-wrapper {
+  flex: 1 1 0;
+  padding-inline: 7px;
+  text-align: center;
+}
+
 .grid-size-control {
-  display: inline-flex;
-  align-items: center;
+  display: grid;
+  grid-template-columns: 58px auto 14px 58px auto;
   gap: 6px;
+  align-items: center;
   color: #475467;
   font-size: 12px;
 }
 
 .grid-size-control .ant-input-number {
-  width: 54px;
+  width: 58px;
 }
 
-.metrics {
-  display: flex;
-  flex-wrap: wrap;
-  justify-content: flex-end;
-  gap: 8px 18px;
-  color: #667085;
+.control-separator {
+  color: #98a2b3;
+  text-align: center;
+}
+
+.select-control {
+  display: grid;
+  grid-template-columns: 42px minmax(0, 1fr);
+  gap: 10px;
+  align-items: center;
+  color: #475467;
   font-size: 12px;
-  font-variant-numeric: tabular-nums;
+}
+
+.select-control + .select-control {
+  margin-top: 10px;
+}
+
+.select-control .ant-select {
+  width: 100%;
+}
+
+.legend-color-control {
+  display: grid;
+  grid-template-columns: 42px minmax(0, 1fr);
+  gap: 10px;
+  align-items: center;
+  margin-top: 10px;
+  color: #475467;
+  font-size: 12px;
+}
+
+.legend-color-control .vc-color-wrap {
+  width: 100%;
+  height: 24px;
+  margin: 0;
+  border: 1px solid #d0d5dd;
+  border-radius: 4px;
+}
+
+.frame-style-controls {
+  display: grid;
+  gap: 10px;
+}
+
+.frame-style-control {
+  display: grid;
+  grid-template-columns: 72px minmax(0, 1fr);
+  gap: 10px;
+  align-items: center;
+  color: #475467;
+  font-size: 12px;
+}
+
+.frame-style-control .ant-input-number,
+.frame-style-control .ant-select {
+  width: 100%;
+}
+
+.frame-style-control--switch .ant-switch {
+  width: auto;
+  justify-self: start;
+}
+
+.frame-style-control .vc-color-wrap {
+  width: 100%;
+  height: 24px;
+  margin: 0;
+  border: 1px solid #d0d5dd;
+  border-radius: 4px;
+  box-shadow: none;
+}
+
+.title-controls {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 12px 10px;
+  margin-top: 14px;
+}
+
+.title-control {
+  display: grid;
+  gap: 6px;
+  min-width: 0;
+  color: #475467;
+  font-size: 12px;
+}
+
+.title-control--wide,
+.title-control--color {
+  grid-column: 1 / -1;
+}
+
+.title-control .ant-select,
+.title-control .ant-input-number {
+  width: 100%;
+}
+
+.title-style-controls {
+  display: grid;
+  grid-template-columns: repeat(4, 28px);
+  gap: 4px;
+}
+
+.title-style-controls button {
+  display: inline-grid;
+  width: 28px;
+  height: 28px;
+  padding: 0;
+  color: #475467;
+  font: inherit;
+  font-size: 14px;
+  background: #fff;
+  border: 1px solid #d0d5dd;
+  border-radius: 4px;
+  cursor: pointer;
+  place-items: center;
+}
+
+.title-style-controls button:hover,
+.title-style-controls button:focus-visible,
+.title-style-controls button.is-active {
+  color: #0958d9;
+  border-color: #1677ff;
+}
+
+.title-style-controls button.is-active {
+  background: #e6f4ff;
+}
+
+.title-control--color .vc-color-wrap {
+  width: 40px;
+  height: 28px;
+  margin: 0;
+  border: 1px solid #d0d5dd;
+  border-radius: 4px;
+  box-shadow: none;
 }
 
 .chart-panel {
-  height: clamp(560px, calc(100vh - 190px), 800px);
-  background: transparent;
+  min-width: 0;
+  min-height: 0;
+  height: 100%;
+  overflow: hidden;
 }
 
-@media (max-width: 700px) {
+.chart-panel > .waveform-chart {
+  min-height: 0;
+}
+
+.mobile-control-toggle,
+.control-backdrop,
+.control-panel__close {
+  display: none;
+}
+
+@media (max-width: 900px) {
   .workspace {
-    padding-top: 20px;
+    display: block;
+    padding: 0;
   }
 
-  .workspace__header,
-  .control-bar {
-    align-items: stretch;
-    flex-direction: column;
+  .chart-panel {
+    width: 100%;
+    height: 100%;
   }
 
-  .control-bar__leading {
-    flex-wrap: wrap;
+  .chart-panel > .waveform-chart {
+    border-radius: 0;
   }
 
-  .display-mode-control {
-    max-width: 100%;
+  .mobile-control-toggle {
+    position: fixed;
+    top: 10px;
+    left: 10px;
+    z-index: 20;
+    display: inline-flex;
+    box-shadow: 0 2px 8px rgb(16 24 40 / 14%);
   }
 
-  .metrics {
-    justify-content: flex-start;
+  .control-backdrop {
+    position: fixed;
+    inset: 0 0 0 min(300px, calc(100vw - 48px));
+    z-index: 24;
+    display: block;
+    width: auto;
+    height: 100%;
+    padding: 0;
+    background: rgb(16 24 40 / 35%);
+    border: 0;
+  }
+
+  .control-panel {
+    position: fixed;
+    inset: 0 auto 0 0;
+    z-index: 30;
+    width: min(300px, calc(100vw - 48px));
+    visibility: hidden;
+    border-radius: 0 6px 6px 0;
+    box-shadow: 12px 0 32px rgb(16 24 40 / 18%);
+    transform: translateX(-100%);
+    transition:
+      transform 180ms ease,
+      visibility 0s linear 180ms;
+  }
+
+  .control-panel.is-open {
+    visibility: visible;
+    transform: translateX(0);
+    transition-delay: 0s;
+  }
+
+  .control-panel__close {
+    position: absolute;
+    top: 10px;
+    right: 10px;
+    display: inline-flex;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .control-panel {
+    transition: none;
   }
 }
diff --git a/src/types/chart.ts b/src/types/chart.ts
index 64d6c61..4944016 100644
--- a/src/types/chart.ts
+++ b/src/types/chart.ts
@@ -44,3 +44,53 @@ export interface WaveformRenderingOptions {
   /** Upper bound for rendered points per horizontal CSS pixel. */
   maxPointsPerPixel?: number
 }
+
+/** Text styling for the chart-level title. */
+export interface WaveformTitleTextStyle {
+  color?: string
+  fontSize?: number
+  fontFamily?: string
+  rotation?: number
+  fontWeight?: number | string
+  fontStyle?: 'normal' | 'italic'
+  textDecoration?: 'none' | 'underline'
+  letterSpacing?: string
+}
+
+/** Options for the title rendered once above the complete waveform grid. */
+export interface WaveformTitleOptions {
+  visible?: boolean
+  text: string
+  align?: 'left' | 'center' | 'right'
+  textStyle?: WaveformTitleTextStyle
+}
+
+/** Preset positions for legends rendered inside multi-series tracks. */
+export type WaveformLegendPosition =
+  | 'top-left'
+  | 'top'
+  | 'top-right'
+  | 'right'
+  | 'bottom-right'
+  | 'bottom'
+  | 'bottom-left'
+  | 'left'
+
+/** Controls whether legend items follow the position default or a fixed direction. */
+export type WaveformLegendOrientation = 'auto' | 'horizontal' | 'vertical'
+
+/** Options shared by legends in every multi-series track. */
+export interface WaveformLegendOptions {
+  position?: WaveformLegendPosition
+  orientation?: WaveformLegendOrientation
+  /** CSS color used by the legend panel; alpha controls background transparency. */
+  backgroundColor?: string
+}
+
+/** Styling shared by every non-empty waveform frame. */
+export interface WaveformFrameStyle {
+  borderColor?: string
+  borderWidth?: number
+  borderStyle?: 'solid' | 'dashed'
+  backgroundColor?: string
+}
diff --git a/src/types/data.ts b/src/types/data.ts
index 75c725b..ec1ce19 100644
--- a/src/types/data.ts
+++ b/src/types/data.ts
@@ -20,6 +20,8 @@ export type SingleWaveformData =
  */
 export interface WaveformSeries {
   id?: string
+  /** 相同 trackId 的系列叠加在同一图框中；默认每个系列独占一个图框。 */
+  trackId?: string
   name: string
   unit?: string
   color?: string
@@ -41,6 +43,7 @@ export type WaveformData =
  */
 export interface NormalizedWaveformSeries {
   id: string
+  trackId?: string
   name: string
   unit?: string
   color?: string
diff --git a/src/types/index.ts b/src/types/index.ts
index eb23bde..769051b 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -10,6 +10,12 @@ export type {
   WaveformAnnotationStyle,
   WaveformAnnotation,
   WaveformRenderingOptions,
+  WaveformTitleTextStyle,
+  WaveformTitleOptions,
+  WaveformLegendPosition,
+  WaveformLegendOrientation,
+  WaveformLegendOptions,
+  WaveformFrameStyle,
 } from './chart'
 
 // 数据类型