diff --git a/WorkBench/MainWindow.xaml b/WorkBench/MainWindow.xaml
index a1cbed8..d8eced8 100644
--- a/WorkBench/MainWindow.xaml
+++ b/WorkBench/MainWindow.xaml
@@ -87,14 +87,11 @@
             </StackPanel>
 
             <StackPanel  Grid.Row="1"
-                         x:Name="FlowChartStackPanel">
-
-                    
+                         x:Name="FlowChartStackPanel"
+                         ClipToBounds="True">
                 <Canvas 
-                    
                     x:Name="FlowChartCanvas" 
-                    
-                    Background="#F2EEE8"
+                    Background="#D9FFEA"
                     AllowDrop="True" 
                     MouseDown="FlowChartCanvas_MouseDown"
                     MouseMove="FlowChartCanvas_MouseMove"
@@ -111,12 +108,12 @@
                            Canvas.Left="0" Canvas.Top="0"/>-->
 
                     <!-- Top-Right Thumb -->
-                    <Thumb x:Name="TopRightThumb" 
+                    <!--<Thumb x:Name="TopRightThumb" 
                            Width="10" Height="10"
                            DragDelta="Thumb_DragDelta_TopRight"
                            Cursor="SizeNESW"
                            Canvas.Left="{Binding ActualWidth, ElementName=FlowChartCanvas, Mode=OneWay, Converter={StaticResource RightThumbPositionConverter}}" 
-                           Canvas.Top="0"/>
+                           Canvas.Top="0"/>-->
 
                     <!-- Bottom-Left Thumb -->
                     <!--<Thumb x:Name="BottomLeftThumb" 
@@ -143,12 +140,15 @@
                            Canvas.Top="{Binding ActualHeight, ElementName=FlowChartCanvas, Mode=OneWay, Converter={StaticResource VerticalCenterThumbPositionConverter}}"/>-->
 
                     <!-- Right Thumb -->
-                    <Thumb x:Name="RightThumb" 
-                           Width="10" Height="10"
-                           DragDelta="Thumb_DragDelta_Right"
-                           Cursor="SizeWE"
-                           Canvas.Left="{Binding ActualWidth, ElementName=FlowChartCanvas, Mode=OneWay, Converter={StaticResource RightThumbPositionConverter}}" 
-                           Canvas.Top="{Binding ActualHeight, ElementName=FlowChartCanvas, Mode=OneWay, Converter={StaticResource VerticalCenterThumbPositionConverter}}"/>
+                    <!--Canvas.Left="{Binding ActualWidth, ElementName=FlowChartCanvas, Mode=OneWay, Converter={StaticResource RightThumbPositionConverter}}" 
+Canvas.Top="{Binding ActualHeight, ElementName=FlowChartCanvas, Mode=OneWay, Converter={StaticResource VerticalCenterThumbPositionConverter}}"-->
+                    <Thumb x:Name="RightThumb" Width="5" Cursor="SizeWE" Canvas.Top="0" Canvas.Right="0" DragDelta="Thumb_DragDelta_Right">
+                        <Thumb.Template>
+                            <ControlTemplate>
+                                <Border Background="#B1B9F8" Width="5" Height="{Binding RelativeSource={RelativeSource AncestorType=Canvas}, Path=ActualHeight}" />
+                            </ControlTemplate>
+                        </Thumb.Template>
+                    </Thumb>
 
                     <!-- Top Thumb -->
                     <!--<Thumb x:Name="TopThumb" 
@@ -159,12 +159,15 @@
                            Canvas.Top="0"/>-->
 
                     <!-- Bottom Thumb -->
-                    <Thumb x:Name="BottomThumb" 
-                           Width="10" Height="10"
-                           DragDelta="Thumb_DragDelta_Bottom"
-                           Cursor="SizeNS"
-                           Canvas.Left="{Binding ActualWidth, ElementName=FlowChartCanvas, Mode=OneWay, Converter={StaticResource HorizontalCenterThumbPositionConverter}}" 
-                           Canvas.Top="{Binding ActualHeight, ElementName=FlowChartCanvas, Mode=OneWay, Converter={StaticResource BottomThumbPositionConverter}}"/>
+                    <!--Canvas.Left="{Binding ActualWidth, ElementName=FlowChartCanvas, Mode=OneWay, Converter={StaticResource HorizontalCenterThumbPositionConverter}}" 
+ Canvas.Top="{Binding ActualHeight, ElementName=FlowChartCanvas, Mode=OneWay, Converter={StaticResource BottomThumbPositionConverter}}"-->
+                    <Thumb x:Name="BottomThumb" Height="5" Cursor="SizeNS" Canvas.Bottom="0" Canvas.Left="0"  DragDelta="Thumb_DragDelta_Bottom">
+                        <Thumb.Template>
+                            <ControlTemplate>
+                                <Border Background="#B1B9F8" Height="5" Width="{Binding RelativeSource={RelativeSource AncestorType=Canvas}, Path=ActualWidth}" />
+                            </ControlTemplate>
+                        </Thumb.Template>
+                    </Thumb>
                 </Canvas>
 
 
diff --git a/WorkBench/MainWindow.xaml.cs b/WorkBench/MainWindow.xaml.cs
index f6d156c..e79dbac 100644
--- a/WorkBench/MainWindow.xaml.cs
+++ b/WorkBench/MainWindow.xaml.cs
@@ -221,9 +221,11 @@ namespace Serein.WorkBench
             var logTextWriter = new LogTextWriter(WriteLog);
             Console.SetOut(logTextWriter);
 
-            //transform = new TranslateTransform();
-            //FlowChartCanvas.RenderTransform = transform;
+            UIInit();
+        }
 
+        private void UIInit()
+        {
             canvasTransformGroup = new TransformGroup();
             scaleTransform = new ScaleTransform();
             translateTransform = new TranslateTransform();
@@ -232,6 +234,7 @@ namespace Serein.WorkBench
             canvasTransformGroup.Children.Add(translateTransform);
 
             FlowChartCanvas.RenderTransform = canvasTransformGroup;
+
             FlowChartCanvas.RenderTransformOrigin = new Point(0.5, 0.5);
         }
 
@@ -1164,9 +1167,6 @@ namespace Serein.WorkBench
             ((UIElement)sender).CaptureMouse(); // 捕获鼠标
         }
 
-
-
-
         /// <summary>
         /// 控件的鼠标移动事件，根据鼠标拖动更新控件的位置。
         /// </summary>
@@ -1203,6 +1203,7 @@ namespace Serein.WorkBench
 
             }
         }
+
         /// <summary>
         /// 调整FlowChartCanvas的尺寸，确保显示所有控件。
         /// </summary>
@@ -1284,7 +1285,9 @@ namespace Serein.WorkBench
 
 
         /// <summary>
-        /// FlowChartCanvas中移动时处理，用于实时更新连接线的终点位置。
+        /// 鼠标在画布移动。
+        /// 连接状态下，实时更新连接线的终点位置。
+        /// 移动画布状态下，移动画布。
         /// </summary>
         private void FlowChartCanvas_MouseMove(object sender, MouseEventArgs e)
         {
@@ -1667,33 +1670,13 @@ namespace Serein.WorkBench
 
             if (Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl))
             {
-                if (e.Delta  < 0 && scaleTransform.ScaleX < 0.4) return;
-                if (e.Delta  > 0 && scaleTransform.ScaleX > 3.0) return;
+                if (e.Delta  < 0 && scaleTransform.ScaleX < 0.2) return;
+                if (e.Delta  > 0 && scaleTransform.ScaleX > 2.0) return;
                 double scale = e.Delta > 0 ? 0.1 : -0.1;
+
+
                 scaleTransform.ScaleX += scale;
                 scaleTransform.ScaleY += scale;
-                //AdjustCanvasSize();
-
-
-                //double zoomFactor = e.Delta > 0 ? 1.1 : 0.9;
-
-                //// 获取鼠标相对于Canvas的位置
-                //Point mousePosition = e.GetPosition(this);
-
-                //// 计算缩放后的Canvas中心位置
-                //double absoluteX = mousePosition.X * scaleTransform.ScaleX;
-                //double absoluteY = mousePosition.Y * scaleTransform.ScaleY;
-
-                //// 应用缩放
-                //scaleTransform.ScaleX *= zoomFactor;
-                //scaleTransform.ScaleY *= zoomFactor;
-
-                //// 平移，使缩放中心保持在鼠标光标处
-                //translateTransform.X = mousePosition.X - absoluteX * zoomFactor;
-                //translateTransform.Y = mousePosition.Y - absoluteY * zoomFactor;
-
-                //// 调整画布大小，使其始终占据整个容器
-                //AdjustCanvasSizeToContainer();
             }
         }
 
@@ -1795,84 +1778,92 @@ namespace Serein.WorkBench
 
 
         #region 动态调整区域大小
-        private void Thumb_DragDelta_TopLeft(object sender, DragDeltaEventArgs e)
-        {
-            // 从左上角调整大小
-            double newWidth = Math.Max(FlowChartCanvas.ActualWidth - e.HorizontalChange, 0);
-            double newHeight = Math.Max(FlowChartCanvas.ActualHeight - e.VerticalChange, 0);
+        //private void Thumb_DragDelta_TopLeft(object sender, DragDeltaEventArgs e)
+        //{
+        //    // 从左上角调整大小
+        //    double newWidth = Math.Max(FlowChartCanvas.ActualWidth - e.HorizontalChange, 0);
+        //    double newHeight = Math.Max(FlowChartCanvas.ActualHeight - e.VerticalChange, 0);
 
-            FlowChartCanvas.Width = newWidth;
-            FlowChartCanvas.Height = newHeight;
+        //    FlowChartCanvas.Width = newWidth;
+        //    FlowChartCanvas.Height = newHeight;
 
-            Canvas.SetLeft(FlowChartCanvas, Canvas.GetLeft(FlowChartCanvas) + e.HorizontalChange);
-            Canvas.SetTop(FlowChartCanvas, Canvas.GetTop(FlowChartCanvas) + e.VerticalChange);
-        }
+        //    Canvas.SetLeft(FlowChartCanvas, Canvas.GetLeft(FlowChartCanvas) + e.HorizontalChange);
+        //    Canvas.SetTop(FlowChartCanvas, Canvas.GetTop(FlowChartCanvas) + e.VerticalChange);
+        //}
 
-        private void Thumb_DragDelta_TopRight(object sender, DragDeltaEventArgs e)
-        {
-            // 从右上角调整大小
-            double newWidth = Math.Max(FlowChartCanvas.ActualWidth + e.HorizontalChange, 0);
-            double newHeight = Math.Max(FlowChartCanvas.ActualHeight - e.VerticalChange, 0);
+        //private void Thumb_DragDelta_TopRight(object sender, DragDeltaEventArgs e)
+        //{
+        //    // 从右上角调整大小
+        //    double newWidth = Math.Max(FlowChartCanvas.ActualWidth + e.HorizontalChange, 0);
+        //    double newHeight = Math.Max(FlowChartCanvas.ActualHeight - e.VerticalChange, 0);
 
-            FlowChartCanvas.Width = newWidth;
-            FlowChartCanvas.Height = newHeight;
+        //    FlowChartCanvas.Width = newWidth;
+        //    FlowChartCanvas.Height = newHeight;
 
-            Canvas.SetTop(FlowChartCanvas, Canvas.GetTop(FlowChartCanvas) + e.VerticalChange);
-        }
+        //    Canvas.SetTop(FlowChartCanvas, Canvas.GetTop(FlowChartCanvas) + e.VerticalChange);
+        //}
 
-        private void Thumb_DragDelta_BottomLeft(object sender, DragDeltaEventArgs e)
-        {
-            // 从左下角调整大小
-            double newWidth = Math.Max(FlowChartCanvas.ActualWidth - e.HorizontalChange, 0);
-            double newHeight = Math.Max(FlowChartCanvas.ActualHeight + e.VerticalChange, 0);
+        //private void Thumb_DragDelta_BottomLeft(object sender, DragDeltaEventArgs e)
+        //{
+        //    // 从左下角调整大小
+        //    double newWidth = Math.Max(FlowChartCanvas.ActualWidth - e.HorizontalChange, 0);
+        //    double newHeight = Math.Max(FlowChartCanvas.ActualHeight + e.VerticalChange, 0);
 
-            FlowChartCanvas.Width = newWidth;
-            FlowChartCanvas.Height = newHeight;
+        //    FlowChartCanvas.Width = newWidth;
+        //    FlowChartCanvas.Height = newHeight;
 
-            Canvas.SetLeft(FlowChartCanvas, Canvas.GetLeft(FlowChartCanvas) + e.HorizontalChange);
-        }
+        //    Canvas.SetLeft(FlowChartCanvas, Canvas.GetLeft(FlowChartCanvas) + e.HorizontalChange);
+        //}
 
         private void Thumb_DragDelta_BottomRight(object sender, DragDeltaEventArgs e)
         {
             // 从右下角调整大小
-            double newWidth = Math.Max(FlowChartCanvas.ActualWidth + e.HorizontalChange, 0);
-            double newHeight = Math.Max(FlowChartCanvas.ActualHeight + e.VerticalChange, 0);
+            double newWidth = Math.Max(FlowChartCanvas.ActualWidth + e.HorizontalChange * scaleTransform.ScaleX, 0);
+            double newHeight = Math.Max(FlowChartCanvas.ActualHeight + e.VerticalChange * scaleTransform.ScaleY, 0);
+
+
+
+            newWidth = newWidth < 400 ? 400 : newWidth;
+            newHeight = newHeight < 400 ? 400 : newHeight;
 
             FlowChartCanvas.Width = newWidth;
             FlowChartCanvas.Height = newHeight;
+
+
         }
 
-        private void Thumb_DragDelta_Left(object sender, DragDeltaEventArgs e)
-        {
-            // 从左侧调整大小
-            double newWidth = Math.Max(FlowChartCanvas.ActualWidth - e.HorizontalChange, 0);
+        //private void Thumb_DragDelta_Left(object sender, DragDeltaEventArgs e)
+        //{
+        //    // 从左侧调整大小
+        //    double newWidth = Math.Max(FlowChartCanvas.ActualWidth - e.HorizontalChange, 0);
 
-            FlowChartCanvas.Width = newWidth;
-            Canvas.SetLeft(FlowChartCanvas, Canvas.GetLeft(FlowChartCanvas) + e.HorizontalChange);
-        }
+        //    FlowChartCanvas.Width = newWidth;
+        //    Canvas.SetLeft(FlowChartCanvas, Canvas.GetLeft(FlowChartCanvas) + e.HorizontalChange);
+        //}
 
         private void Thumb_DragDelta_Right(object sender, DragDeltaEventArgs e)
         {
             //从右侧调整大小
-            double newWidth = Math.Max(FlowChartCanvas.ActualWidth + e.HorizontalChange, 0);
+            double newWidth = Math.Max(FlowChartCanvas.ActualWidth + e.HorizontalChange * scaleTransform.ScaleX, 0);
+            newWidth = newWidth < 400 ? 400 : newWidth;
 
             FlowChartCanvas.Width = newWidth;
         }
 
-        private void Thumb_DragDelta_Top(object sender, DragDeltaEventArgs e)
-        {
-            // 从顶部调整大小
-            double newHeight = Math.Max(FlowChartCanvas.ActualHeight - e.VerticalChange, 0);
-
-            FlowChartCanvas.Height = newHeight;
-            Canvas.SetTop(FlowChartCanvas, Canvas.GetTop(FlowChartCanvas) + e.VerticalChange);
-        }
+        //private void Thumb_DragDelta_Top(object sender, DragDeltaEventArgs e)
+        //{
+        //    // 从顶部调整大小
+        //    double newHeight = Math.Max(FlowChartCanvas.ActualHeight - e.VerticalChange, 0);
+            
+        //    FlowChartCanvas.Height = newHeight;
+        //    Canvas.SetTop(FlowChartCanvas, Canvas.GetTop(FlowChartCanvas) + e.VerticalChange);
+        //}
 
         private void Thumb_DragDelta_Bottom(object sender, DragDeltaEventArgs e)
         {
             // 从底部调整大小
-            double newHeight = Math.Max(FlowChartCanvas.ActualHeight + e.VerticalChange, 0);
-
+            double newHeight = Math.Max(FlowChartCanvas.ActualHeight + e.VerticalChange * scaleTransform.ScaleY, 0);
+            newHeight = newHeight < 400 ? 400 : newHeight;
             FlowChartCanvas.Height = newHeight;
         }
 
diff --git a/WorkBench/Node/View/ActionRegionControl.xaml b/WorkBench/Node/View/ActionRegionControl.xaml
index 6e2021b..9040307 100644
--- a/WorkBench/Node/View/ActionRegionControl.xaml
+++ b/WorkBench/Node/View/ActionRegionControl.xaml
@@ -16,14 +16,6 @@
             </StackPanel>
         </Border>
     
-        <Thumb x:Name="ResizeTop" Cursor="SizeNS" Height="4" HorizontalAlignment="Stretch" VerticalAlignment="Top"
-               DragDelta="ResizeTop_DragDelta"/>
-        <Thumb x:Name="ResizeBottom" Cursor="SizeNS" Height="4" HorizontalAlignment="Stretch" VerticalAlignment="Bottom"
-               DragDelta="ResizeBottom_DragDelta"/>
-        <Thumb x:Name="ResizeLeft" Cursor="SizeWE" Width="4" HorizontalAlignment="Left" VerticalAlignment="Stretch"
-               DragDelta="ResizeLeft_DragDelta"/>
-        <Thumb x:Name="ResizeRight" Cursor="SizeWE" Width="4" HorizontalAlignment="Right" VerticalAlignment="Stretch"
-               DragDelta="ResizeRight_DragDelta"/>
     </Grid>
 
 </local:NodeControlBase>
diff --git a/WorkBench/Node/View/ActionRegionControl.xaml.cs b/WorkBench/Node/View/ActionRegionControl.xaml.cs
index d6528d1..f0b0e6e 100644
--- a/WorkBench/Node/View/ActionRegionControl.xaml.cs
+++ b/WorkBench/Node/View/ActionRegionControl.xaml.cs
@@ -16,7 +16,6 @@ namespace Serein.WorkBench.Node.View
         private new readonly CompositeActionNode Node;
 
         public ActionRegionControl() : base()
-
         {
             InitializeComponent();
         }
@@ -27,38 +26,6 @@ namespace Serein.WorkBench.Node.View
             base.Name = "动作组合节点";
         }
 
-        #region 动态调整区域大小
-        private void ResizeTop_DragDelta(object sender, DragDeltaEventArgs e)
-        {
-            double oldHeight = Height;
-            double newHeight = Math.Max(MinHeight, oldHeight - e.VerticalChange);
-            Height = newHeight;
-            Canvas.SetTop(this, Canvas.GetTop(this) + (oldHeight - newHeight));
-        }
-
-        private void ResizeBottom_DragDelta(object sender, DragDeltaEventArgs e)
-        {
-            double newHeight = Math.Max(MinHeight, Height + e.VerticalChange);
-            Height = newHeight;
-        }
-
-        private void ResizeLeft_DragDelta(object sender, DragDeltaEventArgs e)
-        {
-            double oldWidth = Width;
-            double newWidth = Math.Max(MinWidth, oldWidth - e.HorizontalChange);
-            Width = newWidth;
-            Canvas.SetLeft(this, Canvas.GetLeft(this) + (oldWidth - newWidth));
-        }
-
-        private void ResizeRight_DragDelta(object sender, DragDeltaEventArgs e)
-        {
-            double newWidth = Math.Max(MinWidth, Width + e.HorizontalChange);
-            Width = newWidth;
-        }
-
-#endregion
-
-
         public void AddAction(NodeControlBase node, bool isTask = false)
         {
             /*TextBlock actionText = new TextBlock
diff --git a/WorkBench/Node/View/ConditionRegionControl.xaml b/WorkBench/Node/View/ConditionRegionControl.xaml
index 5d13f71..6ec977f 100644
--- a/WorkBench/Node/View/ConditionRegionControl.xaml
+++ b/WorkBench/Node/View/ConditionRegionControl.xaml
@@ -20,14 +20,5 @@
                 <ListBox x:Name="ConditionsListBox"  AllowDrop="True" Drop="ConditionsListBox_Drop"/>
             </StackPanel>
         </Border>
-
-        <Thumb x:Name="ResizeTop" Cursor="SizeNS" Height="4" HorizontalAlignment="Stretch" VerticalAlignment="Top"
-               DragDelta="ResizeTop_DragDelta"/>
-        <Thumb x:Name="ResizeBottom" Cursor="SizeNS" Height="4" HorizontalAlignment="Stretch" VerticalAlignment="Bottom"
-               DragDelta="ResizeBottom_DragDelta"/>
-        <Thumb x:Name="ResizeLeft" Cursor="SizeWE" Width="4" HorizontalAlignment="Left" VerticalAlignment="Stretch"
-               DragDelta="ResizeLeft_DragDelta"/>
-        <Thumb x:Name="ResizeRight" Cursor="SizeWE" Width="4" HorizontalAlignment="Right" VerticalAlignment="Stretch"
-               DragDelta="ResizeRight_DragDelta"/>
     </Grid>
 </local:NodeControlBase>
diff --git a/WorkBench/Node/View/ConditionRegionControl.xaml.cs b/WorkBench/Node/View/ConditionRegionControl.xaml.cs
index 351c4fd..416cb0c 100644
--- a/WorkBench/Node/View/ConditionRegionControl.xaml.cs
+++ b/WorkBench/Node/View/ConditionRegionControl.xaml.cs
@@ -23,36 +23,6 @@ namespace Serein.WorkBench.Node.View
             InitializeComponent();
         }
 
-        #region 动态调整区域大小
-        private void ResizeTop_DragDelta(object sender, DragDeltaEventArgs e)
-        {
-            double oldHeight = Height;
-            double newHeight = Math.Max(MinHeight, oldHeight - e.VerticalChange);
-            Height = newHeight;
-            Canvas.SetTop(this, Canvas.GetTop(this) + (oldHeight - newHeight));
-        }
-
-        private void ResizeBottom_DragDelta(object sender, DragDeltaEventArgs e)
-        {
-            double newHeight = Math.Max(MinHeight, Height + e.VerticalChange);
-            Height = newHeight;
-        }
-
-        private void ResizeLeft_DragDelta(object sender, DragDeltaEventArgs e)
-        {
-            double oldWidth = Width;
-            double newWidth = Math.Max(MinWidth, oldWidth - e.HorizontalChange);
-            Width = newWidth;
-            Canvas.SetLeft(this, Canvas.GetLeft(this) + (oldWidth - newWidth));
-        }
-
-        private void ResizeRight_DragDelta(object sender, DragDeltaEventArgs e)
-        {
-            double newWidth = Math.Max(MinWidth, Width + e.HorizontalChange);
-            Width = newWidth;
-        }
-
-        #endregion
 
 
         /// <summary>