diff --git a/src/renderer/components/ActionBar.vue b/src/renderer/components/ActionBar.vue
new file mode 100644
index 00000000..49d3df07
--- /dev/null
+++ b/src/renderer/components/ActionBar.vue
@@ -0,0 +1,137 @@
+<template>
+  <div class="action-bar">
+    <div class="btns">
+      <div>
+        <div class="btn flat" @click="toggleOutline()" :title="$t(showOutline ? 'files' : 'outline')">
+          <svg-icon v-if="showOutline" name="folder-tree-solid" />
+          <svg-icon v-else name="list" />
+        </div>
+      </div>
+    </div>
+    <div class="title">{{$t(showOutline ? 'outline' : 'files')}}</div>
+    <div class="btns" v-if="navigation">
+      <div v-for="(item, i) in navigation.items" :key="i">
+        <div
+          v-if="item.showInActionBar && item.type === 'btn'"
+          :class="{ btn: true, flat: item.flat, disabled: item.disabled, checked: item.checked }"
+          :title="item.title"
+          @click.stop="item.onClick"
+        >
+          <svg-icon :name="item.icon" />
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script lang="ts" setup>
+import { onBeforeUnmount, ref, toRef } from 'vue'
+import { useStore } from 'vuex'
+import { registerAction, removeAction } from '@fe/core/action'
+import { getSchema, Schema } from '@fe/services/control-center'
+import type { AppState } from '@fe/support/store'
+import SvgIcon from './SvgIcon.vue'
+import { useI18n } from '@fe/services/i18n'
+import { toggleOutline } from '@fe/services/layout'
+
+const store = useStore<AppState>()
+const navigation = ref<Schema['navigation']>()
+const showOutline = toRef(store.state, 'showOutline')
+
+useI18n()
+
+registerAction({
+  name: 'action-bar.refresh',
+  handler () {
+    navigation.value = getSchema().navigation
+  }
+})
+
+onBeforeUnmount(() => {
+  removeAction('action-bar.refresh')
+})
+</script>
+
+<style lang="scss" scoped>
+@import '@fe/styles/mixins.scss';
+
+.action-bar {
+  height: 30px;
+  flex: none;
+  border-bottom: 1px solid var(--g-color-87);
+  z-index: 1;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  position: relative;
+
+  & > .title {
+    position: absolute;
+    margin: auto;
+    width: 100%;
+    text-align: center;
+    display: block;
+    font-size: 14px;
+    color: var(--g-color-20);
+    z-index: -1;
+    user-select: none;
+  }
+
+  & > div {
+    display: flex;
+  }
+
+  .btn {
+    width: 30px;
+    height: 30px;
+    box-sizing: border-box;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    font-size: 12px;
+    color: var(--g-color-20);
+    border-radius: var(--g-border-radius);
+    margin: 4px;
+    transition: .1s ease-in-out;
+
+    &.flat {
+      width: 30px;
+      height: 30px;
+      margin: 0;
+    }
+
+    &.checked {
+      background: var(--g-color-96);
+    }
+
+    .svg-icon {
+      width: 12px;
+      height: 12px;
+      pointer-events: none;
+    }
+
+    &:not(.disabled):not(.checked):hover {
+      background: var(--g-color-92);
+    }
+
+    &.disabled {
+      color: var(--g-color-50);
+      cursor: default;
+    }
+  }
+}
+
+@include dark-theme {
+  .action-bar {
+    .btn {
+      &.checked {
+        background: var(--g-color-60);
+      }
+
+      &:not(.disabled):not(.checked):hover {
+        background: var(--g-color-76);
+      }
+    }
+  }
+}
+</style>
diff --git a/src/renderer/components/Layout.vue b/src/renderer/components/Layout.vue
index d296c780..ea9349ea 100644
--- a/src/renderer/components/Layout.vue
+++ b/src/renderer/components/Layout.vue
@@ -231,6 +231,18 @@ export default defineComponent({
   flex: none;
   height: 100%;
   border-right: 1px solid var(--g-color-86);
+  display: flex;
+  flex-direction: column;
+  background: var(--g-color-98);
+
+  ::v-deep(.action-bar .btns) {
+    opacity: 0;
+    transition: 0.2s;
+  }
+
+  &:hover ::v-deep(.action-bar .btns) {
+    opacity: 1;
+  }
 }
 
 .sash-right {
diff --git a/src/renderer/components/Outline.vue b/src/renderer/components/Outline.vue
new file mode 100644
index 00000000..88bdcd6b
--- /dev/null
+++ b/src/renderer/components/Outline.vue
@@ -0,0 +1,107 @@
+<template>
+  <div class="outline-toc">
+    <div v-if="(headings || heads).length < 1" class="empty">Empty</div>
+    <div
+      class="heading"
+      v-for="(head, index) in (headings || heads)"
+      :key="index"
+      :class="head.class"
+      :style="{paddingLeft: `${head.level + 1}em`}"
+      @click="handleClickItem(head)">
+      {{ head.text }}
+      <span class="tag-name">{{head.tag}}</span>
+    </div>
+  </div>
+</template>
+
+<script lang="ts">
+import { registerHook, removeHook } from '@fe/core/hook'
+import { revealLineInCenter } from '@fe/services/editor'
+import { getHeadings, Heading } from '@fe/services/view'
+import { defineComponent, onBeforeUnmount, ref } from 'vue'
+
+export default defineComponent({
+  name: 'outline',
+  props: {
+    headings: Array as () => Heading[],
+    autoScroll: {
+      type: Boolean,
+      default: true,
+    }
+  },
+  setup (props, { emit }) {
+    function handleClickItem (heading: Heading) {
+      emit('click-item', heading)
+      if (props.autoScroll) {
+        revealLineInCenter(heading.sourceLine)
+      }
+    }
+
+    const heads = ref<Heading[]>([])
+
+    function refresh () {
+      if (props.headings) {
+        heads.value = []
+      } else {
+        heads.value = getHeadings()
+      }
+    }
+
+    registerHook('VIEW_RENDERED', refresh)
+
+    onBeforeUnmount(() => {
+      removeHook('VIEW_RENDERED', refresh)
+    })
+
+    return { heads, handleClickItem }
+  },
+})
+</script>
+
+<style lang="scss" scoped>
+@import '@fe/styles/mixins.scss';
+
+.outline-toc {
+  overflow-y: auto;
+  overflow-x: hidden;
+  padding-bottom: 16px;
+  user-select: none;
+
+  & > .empty {
+    text-align: center;
+    padding-top: 4em;
+    font-size: 20px;
+    color: var(--g-color-40);
+    font-weight: lighter;
+  }
+
+  & > .heading {
+    font-size: 14px;
+    line-height: 18px;
+    padding: 7px .5em;
+    display: flex;
+    border-radius: var(--g-border-radius);
+    cursor: pointer;
+
+    &:hover {
+      background: rgba(0, 0, 0, 0.1);
+    }
+
+    &.tag-h1 {
+      font-weight: bold;
+    }
+
+    .tag-name {
+      color: var(--g-color-60);
+      font-size: 12px;
+      padding-left: 0.5em;
+    }
+  }
+}
+
+@include dark-theme {
+  .outline-toc > .heading:hover {
+    background: rgba(255, 255, 255, 0.14);
+  }
+}
+</style>
diff --git a/src/renderer/components/Preview.vue b/src/renderer/components/Preview.vue
index 3f6853ff..e7a818d9 100644
--- a/src/renderer/components/Preview.vue
+++ b/src/renderer/components/Preview.vue
@@ -26,15 +26,7 @@
         </div>
       </div>
       <div class="catalog" :style="{maxHeight: `min(${(height - 120) + 'px'}, 70vh)`}">
-        <div
-          v-for="(head, index) in heads"
-          :key="index"
-          :class="head.class"
-          :style="{paddingLeft: `${head.level + 1}em`}"
-          @click="syncScroll(head.sourceLine)">
-          {{ head.text }}
-          <span class="tag-name">{{head.tag}}</span>
-        </div>
+        <Outline :headings="heads" :auto-scroll="false" @click-item="(head: any) => syncScroll(head.sourceLine)" />
       </div>
     </div>
     <div :class="{'scroll-to-top': true, 'hide': scrollTop < 30}" :style="scrollToTopStyle" @click="scrollToTop">TOP</div>
@@ -55,7 +47,7 @@ import { registerHook, removeHook, triggerHook } from '@fe/core/hook'
 import { registerAction, removeAction } from '@fe/core/action'
 import { revealLineInCenter } from '@fe/services/editor'
 import { showExport, toUri } from '@fe/services/document'
-import { getContextMenuItems } from '@fe/services/view'
+import { getContextMenuItems, getHeadings, Heading } from '@fe/services/view'
 import { useContextMenu } from '@fe/support/ui/context-menu'
 import { DOM_ATTR_NAME } from '@fe/support/constant'
 import { useI18n } from '@fe/services/i18n'
@@ -64,6 +56,7 @@ import type { RenderEnv } from '@fe/types'
 
 import Render from './Render.vue'
 import SvgIcon from './SvgIcon.vue'
+import Outline from './Outline.vue'
 
 import 'highlight.js/styles/atom-one-dark.css'
 import 'katex/dist/katex.min.css'
@@ -72,7 +65,7 @@ const logger = getLogger('preview')
 
 export default defineComponent({
   name: 'xview',
-  components: { Render, SvgIcon },
+  components: { Render, SvgIcon, Outline },
   setup () {
     useI18n()
 
@@ -93,13 +86,7 @@ export default defineComponent({
 
     const width = ref(1024)
     const height = ref(1024)
-    const heads = ref<{
-      tag: string;
-      class: string[];
-      text: string;
-      level: number;
-      sourceLine: number;
-    }[]>([])
+    const heads = ref<Heading[]>([])
     const todoCount = ref(0)
     const todoDoneCount = ref(0)
     const scrollTop = ref(0)
@@ -122,18 +109,7 @@ export default defineComponent({
     }
 
     function updateOutline () {
-      const tags = ['h1', 'h2', 'h3', 'h4', 'h5', 'h6']
-      const nodes = refView.value!.querySelectorAll<HTMLHeadElement>(tags.join(','))
-      heads.value = Array.from(nodes).map(node => {
-        const tag = node.tagName.toLowerCase()
-        return {
-          tag,
-          class: [...node.classList, 'tag-' + tag],
-          text: node.innerText,
-          level: tags.indexOf(tag),
-          sourceLine: parseInt(node.dataset.sourceLine || '0')
-        }
-      })
+      heads.value = getHeadings()
     }
 
     function updateTodoCount () {
@@ -447,25 +423,6 @@ export default defineComponent({
     cursor: pointer;
     overflow: auto;
     overflow-x: hidden;
-    padding-bottom: 1em;
-
-    & > div {
-      font-size: 14px;
-      line-height: 18px;
-      padding: 7px .5em;
-      display: flex;
-      border-radius: var(--g-border-radius);
-
-      &:hover {
-        background: var(--g-color-75);
-      }
-
-      .tag-name {
-        color: var(--g-color-60);
-        font-size: 12px;
-        padding-left: 0.5em;
-      }
-    }
   }
 
   .outline-title {
diff --git a/src/renderer/components/SvgIcon.vue b/src/renderer/components/SvgIcon.vue
index 28220170..d7c8023b 100644
--- a/src/renderer/components/SvgIcon.vue
+++ b/src/renderer/components/SvgIcon.vue
@@ -48,6 +48,7 @@ export default defineComponent({
       'star-solid': '<svg aria-hidden="true" focusable="false" data-prefix="fas" data-icon="star" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="svg-inline--fa fa-star fa-w-18"><path fill="currentColor" d="M259.3 17.8L194 150.2 47.9 171.5c-26.2 3.8-36.7 36.1-17.7 54.6l105.7 103-25 145.5c-4.5 26.3 23.2 46 46.4 33.7L288 439.6l130.7 68.7c23.2 12.2 50.9-7.4 46.4-33.7l-25-145.5 105.7-103c19-18.5 8.5-50.8-17.7-54.6L382 150.2 316.7 17.8c-11.7-23.6-45.6-23.9-57.4 0z" class=""></path></svg>',
       'star-regular': '<svg aria-hidden="true" focusable="false" data-prefix="far" data-icon="star" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512" class="svg-inline--fa fa-star fa-w-18"><path fill="currentColor" d="M528.1 171.5L382 150.2 316.7 17.8c-11.7-23.6-45.6-23.9-57.4 0L194 150.2 47.9 171.5c-26.2 3.8-36.7 36.1-17.7 54.6l105.7 103-25 145.5c-4.5 26.3 23.2 46 46.4 33.7L288 439.6l130.7 68.7c23.2 12.2 50.9-7.4 46.4-33.7l-25-145.5 105.7-103c19-18.5 8.5-50.8-17.7-54.6zM388.6 312.3l23.7 138.4L288 385.4l-124.3 65.3 23.7-138.4-100.6-98 139-20.2 62.2-126 62.2 126 139 20.2-100.6 98z" class=""></path></svg>',
       'pen-solid': '<svg aria-hidden="true" focusable="false" data-prefix="fas" data-icon="pen" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="svg-inline--fa fa-pen fa-w-16"><path fill="currentColor" d="M290.74 93.24l128.02 128.02-277.99 277.99-114.14 12.6C11.35 513.54-1.56 500.62.14 485.34l12.7-114.22 277.9-277.88zm207.2-19.06l-60.11-60.11c-18.75-18.75-49.16-18.75-67.91 0l-56.55 56.55 128.02 128.02 56.55-56.55c18.75-18.76 18.75-49.16 0-67.91z" class=""></path></svg>',
+      'folder-tree-solid': '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"><path fill="currentColor" d="M544 32h-112l-32-32H320c-17.62 0-32 14.38-32 32v160c0 17.62 14.38 32 32 32h224c17.62 0 32-14.38 32-32V64C576 46.38 561.6 32 544 32zM544 320h-112l-32-32H320c-17.62 0-32 14.38-32 32v160c0 17.62 14.38 32 32 32h224c17.62 0 32-14.38 32-32v-128C576 334.4 561.6 320 544 320zM64 16C64 7.125 56.88 0 48 0h-32C7.125 0 0 7.125 0 16V416c0 17.62 14.38 32 32 32h224v-64H64V160h192V96H64V16z"/></svg>',
     }
 
     const name = props.name!
diff --git a/src/renderer/components/Tree.vue b/src/renderer/components/Tree.vue
index 85d39764..59ac8229 100644
--- a/src/renderer/components/Tree.vue
+++ b/src/renderer/components/Tree.vue
@@ -92,7 +92,6 @@ export default defineComponent({
   width: 100%;
   box-sizing: border-box;
   overflow: auto;
-  background: var(--g-color-98);
   padding-bottom: 20px;
 }
 
diff --git a/src/renderer/plugins/document-history-stack.ts b/src/renderer/plugins/document-history-stack.ts
index 9bb19f54..34156816 100644
--- a/src/renderer/plugins/document-history-stack.ts
+++ b/src/renderer/plugins/document-history-stack.ts
@@ -93,6 +93,7 @@ export default {
           flat: true,
           title: ctx.i18n.t('control-center.navigation.back', ctx.command.getKeysLabel(backId)),
           disabled: idx <= 0,
+          showInActionBar: true,
           onClick: () => ctx.action.getActionHandler(backId)()
         },
         {
@@ -101,6 +102,7 @@ export default {
           flat: true,
           title: ctx.i18n.t('control-center.navigation.forward', ctx.command.getKeysLabel(forwardId)),
           disabled: idx >= stack.length - 1,
+          showInActionBar: true,
           onClick: () => ctx.action.getActionHandler(forwardId)()
         },
       )
diff --git a/src/renderer/plugins/markdown-heading-number.ts b/src/renderer/plugins/markdown-heading-number.ts
index 43ad520b..9a1994db 100644
--- a/src/renderer/plugins/markdown-heading-number.ts
+++ b/src/renderer/plugins/markdown-heading-number.ts
@@ -46,31 +46,31 @@ export default {
                 counter(h6counter) ".\\0000a0\\0000a0";
       }
 
-      .markdown-view .outline .tag-h1.show-number { counter-reset: outline-h2counter; }
-      .markdown-view .outline .tag-h2.show-number { counter-reset: outline-h3counter; }
-      .markdown-view .outline .tag-h3.show-number { counter-reset: outline-h4counter; }
-      .markdown-view .outline .tag-h4.show-number { counter-reset: outline-h5counter; }
-      .markdown-view .outline .tag-h5.show-number { counter-reset: outline-h6counter; }
+      .outline-toc .tag-h1.show-number { counter-reset: outline-h2counter; }
+      .outline-toc .tag-h2.show-number { counter-reset: outline-h3counter; }
+      .outline-toc .tag-h3.show-number { counter-reset: outline-h4counter; }
+      .outline-toc .tag-h4.show-number { counter-reset: outline-h5counter; }
+      .outline-toc .tag-h5.show-number { counter-reset: outline-h6counter; }
 
-      .markdown-view .outline .tag-h2.show-number:before {
+      .outline-toc .tag-h2.show-number:before {
         counter-increment: outline-h2counter;
         content: counter(outline-h2counter) ".\\0000a0\\0000a0";
       }
 
-      .markdown-view .outline .tag-h3.show-number:before {
+      .outline-toc .tag-h3.show-number:before {
         counter-increment: outline-h3counter;
         content: counter(outline-h2counter) "."
                 counter(outline-h3counter) ".\\0000a0\\0000a0";
       }
 
-      .markdown-view .outline .tag-h4.show-number:before {
+      .outline-toc .tag-h4.show-number:before {
         counter-increment: outline-h4counter;
         content: counter(outline-h2counter) "."
                 counter(outline-h3counter) "."
                 counter(outline-h4counter) ".\\0000a0\\0000a0";
       }
 
-      .markdown-view .outline .tag-h5.show-number:before {
+      .outline-toc .tag-h5.show-number:before {
         counter-increment: outline-h5counter;
         content: counter(outline-h2counter) "."
                 counter(outline-h3counter) "."
@@ -78,7 +78,7 @@ export default {
                 counter(outline-h5counter) ".\\0000a0\\0000a0";
       }
 
-      .markdown-view .outline .tag-h6.show-number:before {
+      .outline-toc .tag-h6.show-number:before {
         counter-increment: outline-h6counter;
         content: counter(outline-h2counter) "."
                 counter(outline-h3counter) "."
diff --git a/src/renderer/plugins/status-bar-control-center.ts b/src/renderer/plugins/status-bar-control-center.ts
index a2d48671..8c48cfe9 100644
--- a/src/renderer/plugins/status-bar-control-center.ts
+++ b/src/renderer/plugins/status-bar-control-center.ts
@@ -111,6 +111,7 @@ export default {
           icon: 'search-solid',
           flat: true,
           title: ctx.i18n.t('control-center.navigation.goto', ctx.command.getKeysLabel('filter.show-quick-open')),
+          showInActionBar: true,
           onClick: () => {
             ctx.action.getActionHandler('filter.show-quick-open')()
             ctx.controlCenter.toggle(false)
diff --git a/src/renderer/services/control-center.ts b/src/renderer/services/control-center.ts
index bb9b61e5..510b4da2 100644
--- a/src/renderer/services/control-center.ts
+++ b/src/renderer/services/control-center.ts
@@ -12,6 +12,7 @@ export type Item = {
   icon: string,
   title: string,
   onClick?: () => void,
+  showInActionBar?: boolean,
 }
 
 export type SchemaItem = { items: Item[] }
@@ -26,6 +27,7 @@ export type SchemaTapper = (schema: Schema) => void
 
 const _refresh = debounce(() => {
   getActionHandler('control-center.refresh')()
+  getActionHandler('action-bar.refresh')()
 }, 10)
 
 /**
diff --git a/src/renderer/services/layout.ts b/src/renderer/services/layout.ts
index 466b23c6..d8d0957d 100644
--- a/src/renderer/services/layout.ts
+++ b/src/renderer/services/layout.ts
@@ -67,6 +67,13 @@ export function toggleXterm (visible?: boolean) {
     }
   })
 }
+/**
+ * Toggle outline visible.
+ * @param visible
+ */
+export function toggleOutline (visible?: boolean) {
+  store.commit('setShowOutline', typeof visible === 'boolean' ? visible : !store.state.showOutline)
+}
 
 registerAction({ name: 'layout.toggle-side', handler: toggleSide, keys: [Alt, 'e'] })
 registerAction({ name: 'layout.toggle-editor', handler: toggleEditor, keys: [Alt, 'x'] })
diff --git a/src/renderer/services/view.ts b/src/renderer/services/view.ts
index 83793f7e..2c2691fd 100644
--- a/src/renderer/services/view.ts
+++ b/src/renderer/services/view.ts
@@ -12,6 +12,13 @@ import { switchDoc } from './document'
 
 export type MenuItem = Components.ContextMenu.Item
 export type BuildContextMenu = (items: MenuItem[], e: MouseEvent) => void
+export type Heading = {
+  tag: string;
+  class: string[];
+  text: string;
+  level: number;
+  sourceLine: number;
+}
 
 let tmpEnableSyncScroll = true
 let syncScrollTimer: any
@@ -168,6 +175,29 @@ export function getViewDom () {
   return getActionHandler('view.get-view-dom')()
 }
 
+/**
+ * Get Headings
+ */
+export function getHeadings (): Heading[] {
+  const tags = ['h1', 'h2', 'h3', 'h4', 'h5', 'h6']
+  const dom = getViewDom()
+  if (!dom) {
+    return []
+  }
+
+  const nodes = dom.querySelectorAll<HTMLHeadElement>(tags.join(','))
+  return Array.from(nodes).map(node => {
+    const tag = node.tagName.toLowerCase()
+    return {
+      tag,
+      class: [...node.classList, 'tag-' + tag],
+      text: node.innerText,
+      level: tags.indexOf(tag),
+      sourceLine: parseInt(node.dataset.sourceLine || '0')
+    }
+  })
+}
+
 /**
  * Get render env.
  * @returns
diff --git a/src/renderer/support/store.ts b/src/renderer/support/store.ts
index c655e0a3..d4af0c4d 100644
--- a/src/renderer/support/store.ts
+++ b/src/renderer/support/store.ts
@@ -11,6 +11,7 @@ export const initState = {
   showView: storage.get('showView', true),
   showEditor: storage.get('showEditor', true),
   showXterm: false,
+  showOutline: false,
   autoPreview: true,
   syncScroll: true,
   showSetting: false,
@@ -88,6 +89,9 @@ export default createStore({
     setShowXterm (state, data) {
       state.showXterm = data
     },
+    setShowOutline (state, data) {
+      state.showOutline = data
+    },
     setInComposition (state, data) {
       state.inComposition = data
     },
diff --git a/src/renderer/views/Main.vue b/src/renderer/views/Main.vue
index df0bd3e0..515690d5 100644
--- a/src/renderer/views/Main.vue
+++ b/src/renderer/views/Main.vue
@@ -7,7 +7,9 @@
       <StatusBar />
     </template>
     <template v-slot:left>
-      <Tree />
+      <ActionBar />
+      <Outline v-show="showOutline" />
+      <Tree v-show="!showOutline" />
     </template>
     <template v-slot:terminal>
       <Xterm @hide="hideXterm" />
@@ -29,10 +31,12 @@
 </template>
 
 <script lang="ts">
-import { defineComponent, onMounted } from 'vue'
+import { defineComponent, onMounted, toRef } from 'vue'
+import { useStore } from 'vuex'
 import startup from '@fe/startup'
 import { getActionHandler } from '@fe/core/action'
 import { FLAG_DISABLE_XTERM } from '@fe/support/args'
+import type { AppState } from '@fe/support/store'
 import Layout from '@fe/components/Layout.vue'
 import TitleBar from '@fe/components/TitleBar.vue'
 import StatusBar from '@fe/components/StatusBar.vue'
@@ -48,6 +52,8 @@ import Premium from '@fe/components/Premium.vue'
 import XFilter from '@fe/components/Filter.vue'
 import ControlCenter from '@fe/components/ControlCenter.vue'
 import DocHistory from '@fe/components/DocHistory.vue'
+import ActionBar from '@fe/components/ActionBar.vue'
+import Outline from '@fe/components/Outline.vue'
 
 export default defineComponent({
   name: 'x-main',
@@ -66,8 +72,12 @@ export default defineComponent({
     ExportPanel,
     ControlCenter,
     DocHistory,
+    ActionBar,
+    Outline,
   },
   setup () {
+    const store = useStore<AppState>()
+    const showOutline = toRef(store.state, 'showOutline')
     onMounted(startup)
 
     const classes = {
@@ -78,7 +88,7 @@ export default defineComponent({
       getActionHandler('layout.toggle-xterm')(false)
     }
 
-    return { classes, hideXterm }
+    return { classes, hideXterm, showOutline }
   }
 })
 </script>
diff --git a/src/share/i18n/languages/en.ts b/src/share/i18n/languages/en.ts
index b58abfae..ad38397b 100644
--- a/src/share/i18n/languages/en.ts
+++ b/src/share/i18n/languages/en.ts
@@ -26,6 +26,8 @@ const data = {
   'close': 'Close',
   'discard': 'Discard',
   'edit': 'Edit',
+  'outline': 'Outline',
+  'files': 'Files',
   'premium': {
     'need-purchase': '[%s] Premium is required',
     'buy-license': 'Buy License',
diff --git a/src/share/i18n/languages/zh-CN.ts b/src/share/i18n/languages/zh-CN.ts
index 0706926c..265b33c9 100644
--- a/src/share/i18n/languages/zh-CN.ts
+++ b/src/share/i18n/languages/zh-CN.ts
@@ -27,6 +27,8 @@ const data: BaseLanguage = {
   'close': '关闭',
   'edit': '编辑',
   'discard': '放弃',
+  'outline': '目录',
+  'files': '文件',
   'premium': {
     'need-purchase': '[%s] 需要高级版',
     'buy-license': '立即购买',