diff --git a/web/src/pages/Doc/en/command/index.md b/web/src/pages/Doc/en/command/index.md
index 6c9b4427..a3749033 100644
--- a/web/src/pages/Doc/en/command/index.md
+++ b/web/src/pages/Doc/en/command/index.md
@@ -5,8 +5,20 @@ includes many built-in commands and can also be added manually. A command refers
 to an operation that needs to add a copy to the history stack data. The
 `mindMap.command` instance can be obtained through this."
 
+## Props
+
+### history
+
+The current list of all historical data. Do not manually modify the array.
+
+### activeHistoryIndex
+
+The current historical data index. Do not manually modify this property.
+
 ## Methods
 
+Please use the command 'Back' or 'FORWARD' to move forward or backward.
+
 ### pause()
 
 > v0.9.11+
@@ -38,7 +50,7 @@ removed
 
 ### getCopyData()
 
-Get a copy of the rendering tree data
+Get a copy of the rendering tree data. That is, the data of the current canvas.
 
 ### clearHistory()
 
diff --git a/web/src/pages/Doc/en/command/index.vue b/web/src/pages/Doc/en/command/index.vue
index 4607c8bd..9c663301 100644
--- a/web/src/pages/Doc/en/command/index.vue
+++ b/web/src/pages/Doc/en/command/index.vue
@@ -5,7 +5,13 @@
 includes many built-in commands and can also be added manually. A command refers
 to an operation that needs to add a copy to the history stack data. The
 <code>mindMap.command</code> instance can be obtained through this.&quot;</p>
+<h2>Props</h2>
+<h3>history</h3>
+<p>The current list of all historical data. Do not manually modify the array.</p>
+<h3>activeHistoryIndex</h3>
+<p>The current historical data index. Do not manually modify this property.</p>
 <h2>Methods</h2>
+<p>Please use the command 'Back' or 'FORWARD' to move forward or backward.</p>
 <h3>pause()</h3>
 <blockquote>
 <p>v0.9.11+</p>
@@ -26,7 +32,7 @@ to an operation that needs to add a copy to the history stack data. The
 <p><code>fn</code>: Method to be removed, if not provided all methods for the command will be
 removed</p>
 <h3>getCopyData()</h3>
-<p>Get a copy of the rendering tree data</p>
+<p>Get a copy of the rendering tree data. That is, the data of the current canvas.</p>
 <h3>clearHistory()</h3>
 <p>Clear the history stack data</p>
 
diff --git a/web/src/pages/Doc/zh/command/index.md b/web/src/pages/Doc/zh/command/index.md
index 2005f1a7..25c6884b 100644
--- a/web/src/pages/Doc/zh/command/index.md
+++ b/web/src/pages/Doc/zh/command/index.md
@@ -2,8 +2,20 @@
 
 `command`实例负责命令的添加及执行，内置了很多命令，也可以自行添加，命令指需要在历史堆栈数据里添加副本的操作。可通过`mindMap.command`获取到该实例
 
+## 属性
+
+### history
+
+当前所有的历史数据列表。不要手动修改该数组。
+
+### activeHistoryIndex
+
+当前所在的历史数据索引。不要手动修改该属性。
+
 ## 方法
 
+前进后退请使用命令`BACK`或`FORWARD`。
+
 ### pause()
 
 > v0.9.11+
@@ -34,7 +46,7 @@
 
 ### getCopyData()
 
-获取渲染树数据副本
+获取渲染树数据副本。即当前画布的数据。
 
 ### clearHistory()
 
diff --git a/web/src/pages/Doc/zh/command/index.vue b/web/src/pages/Doc/zh/command/index.vue
index 1ec0ee65..373f2247 100644
--- a/web/src/pages/Doc/zh/command/index.vue
+++ b/web/src/pages/Doc/zh/command/index.vue
@@ -2,7 +2,13 @@
   <div>
     <h1>Command 实例</h1>
 <p><code>command</code>实例负责命令的添加及执行，内置了很多命令，也可以自行添加，命令指需要在历史堆栈数据里添加副本的操作。可通过<code>mindMap.command</code>获取到该实例</p>
+<h2>属性</h2>
+<h3>history</h3>
+<p>当前所有的历史数据列表。不要手动修改该数组。</p>
+<h3>activeHistoryIndex</h3>
+<p>当前所在的历史数据索引。不要手动修改该属性。</p>
 <h2>方法</h2>
+<p>前进后退请使用命令<code>BACK</code>或<code>FORWARD</code>。</p>
 <h3>pause()</h3>
 <blockquote>
 <p>v0.9.11+</p>
@@ -22,7 +28,7 @@
 <p><code>name</code>：要移除的命令名称</p>
 <p><code>fn</code>：要移除的方法，不传的话移除该命令所有的方法</p>
 <h3>getCopyData()</h3>
-<p>获取渲染树数据副本</p>
+<p>获取渲染树数据副本。即当前画布的数据。</p>
 <h3>clearHistory()</h3>
 <p>清空历史堆栈数据</p>