diff --git a/XplorePlane/Views/Main/MainWindow.xaml b/XplorePlane/Views/Main/MainWindow.xaml
index 2e0f475..3a6da5b 100644
--- a/XplorePlane/Views/Main/MainWindow.xaml
+++ b/XplorePlane/Views/Main/MainWindow.xaml
@@ -469,21 +469,14 @@
             Grid.ColumnSpan="3"
             Margin="0">
             <Grid.ColumnDefinitions>
-                <ColumnDefinition x:Name="NavColumn" Width="0" />
                 <ColumnDefinition Width="{Binding ViewportPanelWidth}" />
                 <ColumnDefinition Width="{Binding ImagePanelWidth}" />
                 <ColumnDefinition Width="350" />
             </Grid.ColumnDefinitions>
 
-            <!--  左侧: 计划导航 (默认隐藏，点击CNC AccountingNumberFormatButton显示)  -->
-            <views:NavigationPanelView
-                x:Name="NavigationPanel"
-                Grid.Column="0"
-                Visibility="Collapsed" />
-
             <!--  中间: 2D Viewport  -->
             <Border
-                Grid.Column="1"
+                Grid.Column="0"
                 BorderBrush="#DDDDDD"
                 BorderThickness="1,0,1,0">
                 <views:ViewportPanelView />
@@ -491,14 +484,14 @@
 
             <!--  中间: 图像  -->
             <Border
-                Grid.Column="2"
+                Grid.Column="1"
                 BorderBrush="#DDDDDD"
                 BorderThickness="0,0,1,0">
                 <views:ImagePanelView />
             </Border>
 
             <!--  右侧: 属性面板  -->
-            <Grid Grid.Column="3">
+            <Grid Grid.Column="2">
                 <Grid.ColumnDefinitions>
                     <ColumnDefinition Width="350*" />
                 </Grid.ColumnDefinitions>
diff --git a/XplorePlane/Views/Main/MainWindow.xaml.cs b/XplorePlane/Views/Main/MainWindow.xaml.cs
index a2bc49e..ba16191 100644
--- a/XplorePlane/Views/Main/MainWindow.xaml.cs
+++ b/XplorePlane/Views/Main/MainWindow.xaml.cs
@@ -13,12 +13,5 @@ namespace XplorePlane.Views
             InitializeComponent();
             DataContext = viewModel;
         }
-
-        private void AccountingNumberFormatButton_Click(object sender, RoutedEventArgs e)
-        {
-            bool show = NavigationPanel.Visibility != Visibility.Visible;
-            NavigationPanel.Visibility = show ? Visibility.Visible : Visibility.Collapsed;
-            NavColumn.Width = show ? new GridLength(180) : new GridLength(0);
-        }
     }
 }