diff --git a/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml b/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
index e196eb0..4ebda94 100644
--- a/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
+++ b/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
@@ -991,13 +991,13 @@
                         <Fluent:Button Margin="5" Header="上移一层" Command="{Binding PageViewModel.DiagramViewModel.BringForwardCommand}" Size="Middle" Icon="/AIStudio.Wpf.DiagramApp;component/Images/BringForward.png"/>
                         <Fluent:Button Margin="5" Header="下移一层" Command="{Binding PageViewModel.DiagramViewModel.SendBackwardCommand}" Size="Middle" Icon="/AIStudio.Wpf.DiagramApp;component/Images/SendBackward.png"/>
                     </Fluent:DropDownButton>
-                    <Fluent:DropDownButton Header="组合" Icon="{iconPacks:Material Kind=Group}" Width="50" VerticalAlignment="Top">
-                        <Fluent:DropDownButton.LargeIcon>
+                    <Fluent:SplitButton Header="组合" Icon="{iconPacks:Material Kind=Group}" Width="50" VerticalAlignment="Top" Command="{Binding PageViewModel.DiagramViewModel.GroupCommand}">
+                        <Fluent:SplitButton.LargeIcon>
                             <iconPacks:PackIconMaterial Kind="Group" VerticalAlignment="Center" HorizontalAlignment="Center"/>
-                        </Fluent:DropDownButton.LargeIcon>
+                        </Fluent:SplitButton.LargeIcon>
                         <Fluent:Button Margin="5" Header="组合" Command="{Binding PageViewModel.DiagramViewModel.GroupCommand}" Size="Middle" Icon="/AIStudio.Wpf.DiagramApp;component/Images/BringForward.png"/>
                         <Fluent:Button Margin="5" Header="取消组合" Command="{Binding PageViewModel.DiagramViewModel.UngroupCommand}" Size="Middle" Icon="/AIStudio.Wpf.DiagramApp;component/Images/SendBackward.png"/>
-                    </Fluent:DropDownButton>
+                    </Fluent:SplitButton>
                     <Fluent:DropDownButton Header="对齐" Icon="{iconPacks:Material Kind=AlignHorizontalLeft}" Width="50" VerticalAlignment="Top">
                         <Fluent:DropDownButton.LargeIcon>
                             <iconPacks:PackIconMaterial Kind="AlignHorizontalLeft" VerticalAlignment="Center" HorizontalAlignment="Center"/>
diff --git a/AIStudio.Wpf.DiagramDesigner/Controls/DesignerCanvas.cs b/AIStudio.Wpf.DiagramDesigner/Controls/DesignerCanvas.cs
index 2b281ae..319c723 100644
--- a/AIStudio.Wpf.DiagramDesigner/Controls/DesignerCanvas.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Controls/DesignerCanvas.cs
@@ -540,7 +540,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             DragObject dragObject = e.Data.GetData(typeof(DragObject)) as DragObject;
             if (dragObject != null)
             {
-                _viewModel.ClearSelectedItemsCommand.Execute(null);
+                _viewModel.ClearSelectedItems();
                 Point position = e.GetPosition(this);
                 if (dragObject.DesignerItem is SerializableObject serializableObject)
                 {
@@ -587,7 +587,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 foreach (var file in files)
                 {
-                    _viewModel.ClearSelectedItemsCommand.Execute(null);
+                    _viewModel.ClearSelectedItems();
                     Point position = e.GetPosition(this);
                     ImageItemViewModel itemBase = new ImageItemViewModel();
                     itemBase.Icon = file;
diff --git a/AIStudio.Wpf.DiagramDesigner/Controls/DragThumb.cs b/AIStudio.Wpf.DiagramDesigner/Controls/DragThumb.cs
index 51b6deb..5b27208 100644
--- a/AIStudio.Wpf.DiagramDesigner/Controls/DragThumb.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Controls/DragThumb.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading;
 using System.Windows;
 using System.Windows.Controls.Primitives;
 using System.Windows.Media;
@@ -59,7 +60,7 @@ namespace AIStudio.Wpf.DiagramDesigner.Controls
 
                 designerItems = designerItems.Distinct().ToList();
 
-                DiagramViewModel.DoCommandManager.BeginDo = true;
+                Interlocked.Increment(ref DiagramViewModel.DoCommandManager.BeginDo);
                 foreach (DesignerItemViewModelBase item in designerItems.OfType<DesignerItemViewModelBase>())
                 {
                     item.SetOldValue(item.TopLeft, nameof(item.TopLeft));
@@ -76,8 +77,8 @@ namespace AIStudio.Wpf.DiagramDesigner.Controls
         private void DragThumb_DragCompleted(object sender, DragCompletedEventArgs e)
         {
             if (drag == false) 
-            { 
-                DiagramViewModel.DoCommandManager.BeginDo = false;
+            {
+                Interlocked.Decrement(ref DiagramViewModel.DoCommandManager.BeginDo);
                 return; 
             }
 
@@ -91,7 +92,7 @@ namespace AIStudio.Wpf.DiagramDesigner.Controls
                 Dictionary<DesignerItemViewModelBase, Tuple<PointBase, PointBase>> infos =
                     designerItems.OfType<DesignerItemViewModelBase>().ToDictionary(p => p,
                     p => new Tuple<PointBase, PointBase>(p.GetOldValue<PointBase>(nameof(p.TopLeft)), p.TopLeft));
-                DiagramViewModel.DoCommandManager.BeginDo = false;
+                Interlocked.Decrement(ref DiagramViewModel.DoCommandManager.BeginDo);
                 DiagramViewModel.DoCommandManager.DoNewCommand(this.ToString(),
                   () => {
                       foreach (var info in infos)
diff --git a/AIStudio.Wpf.DiagramDesigner/Controls/ResizeThumb.cs b/AIStudio.Wpf.DiagramDesigner/Controls/ResizeThumb.cs
index d187a11..dcae788 100644
--- a/AIStudio.Wpf.DiagramDesigner/Controls/ResizeThumb.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Controls/ResizeThumb.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
@@ -35,7 +36,7 @@ namespace AIStudio.Wpf.DiagramDesigner.Controls
             {
                 designerItems = designerItem.Root.SelectedItems.ToList();
 
-                DiagramViewModel.DoCommandManager.BeginDo = true;
+                Interlocked.Increment(ref DiagramViewModel.DoCommandManager.BeginDo);
                 foreach (DesignerItemViewModelBase item in designerItems.OfType<DesignerItemViewModelBase>())
                 {
                     item.SetOldValue(item.Size, nameof(item.Size));
@@ -57,7 +58,7 @@ namespace AIStudio.Wpf.DiagramDesigner.Controls
                   designerItems.OfType<DesignerItemViewModelBase>().ToDictionary(p => p,
                   p => new Tuple<SizeBase, SizeBase>(p.GetOldValue<SizeBase>(nameof(p.Size)), p.Size));
 
-                DiagramViewModel.DoCommandManager.BeginDo = false;
+                Interlocked.Decrement(ref DiagramViewModel.DoCommandManager.BeginDo);
                 DiagramViewModel.DoCommandManager.DoNewCommand(this.ToString(),
                   () => {
                       foreach (var info in infos)
diff --git a/AIStudio.Wpf.DiagramDesigner/Controls/RotateThumb.cs b/AIStudio.Wpf.DiagramDesigner/Controls/RotateThumb.cs
index 3af9cf6..80ac038 100644
--- a/AIStudio.Wpf.DiagramDesigner/Controls/RotateThumb.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Controls/RotateThumb.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
@@ -42,7 +43,7 @@ namespace AIStudio.Wpf.DiagramDesigner.Controls
             {
                 designerItems = designerItem.Root.SelectedItems.ToList();
 
-                DiagramViewModel.DoCommandManager.BeginDo = true;
+                Interlocked.Increment(ref DiagramViewModel.DoCommandManager.BeginDo);
                 foreach (DesignerItemViewModelBase item in designerItems.OfType<DesignerItemViewModelBase>())
                 {
                     item.SetOldValue(this.designerItem.Angle, nameof(this.designerItem.Angle));
@@ -78,7 +79,7 @@ namespace AIStudio.Wpf.DiagramDesigner.Controls
                 Dictionary<DesignerItemViewModelBase, Tuple<double, double>> infos =
                    designerItems.OfType<DesignerItemViewModelBase>().ToDictionary(p => p,
                    p => new Tuple<double, double>(p.GetOldValue<double>(nameof(p.Angle)), p.Angle));
-                DiagramViewModel.DoCommandManager.BeginDo = false;
+                Interlocked.Decrement(ref DiagramViewModel.DoCommandManager.BeginDo);
                 DiagramViewModel.DoCommandManager.DoNewCommand(this.ToString(),
                   () => {
                       foreach (var info in infos)
diff --git a/AIStudio.Wpf.DiagramDesigner/Helpers/DoCommandManager.cs b/AIStudio.Wpf.DiagramDesigner/Helpers/DoCommandManager.cs
index 12c68f8..14f231d 100644
--- a/AIStudio.Wpf.DiagramDesigner/Helpers/DoCommandManager.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Helpers/DoCommandManager.cs
@@ -66,23 +66,13 @@ namespace AIStudio.Wpf.DiagramDesigner
             UnDoActionStack = new Stack<Command>();
         }
 
-        private bool _beginDo;
-        public bool BeginDo
-        {
-            get
-            {
-                return _beginDo;
-            }
-            set
-            {
-                _beginDo = value;
-            }
-        }
+        public int BeginDo;
+
 
         private bool _undoing;
         public void DoNewCommand(string name, Action action, Action unDoAction, Action clearAction = null, bool doit = true)
         {
-            if (BeginDo == true)
+            if (BeginDo > 0)
                 return;
             if (_undoing == true)
                 return;
diff --git a/AIStudio.Wpf.DiagramDesigner/UserControls/TextControl.xaml b/AIStudio.Wpf.DiagramDesigner/UserControls/TextControl.xaml
index 2fc44b0..cb561ab 100644
--- a/AIStudio.Wpf.DiagramDesigner/UserControls/TextControl.xaml
+++ b/AIStudio.Wpf.DiagramDesigner/UserControls/TextControl.xaml
@@ -19,7 +19,7 @@
     </UserControl.Resources>
     <Grid IsHitTestVisible="{Binding IsHitTestVisible}">       
         <TextBox x:Name="PART_TextBlock"                         
-                         Text="{Binding Text, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"  
+                         Text="{Binding Text, Mode=TwoWay, UpdateSourceTrigger=LostFocus}"  
                          Foreground="{Binding FontViewModel.FontColor,Converter={StaticResource ColorBrushConverter}}"
                          FontSize="{Binding FontViewModel.FontSize}" 
                          FontFamily="{Binding FontViewModel.FontFamily}"  
@@ -37,7 +37,7 @@
       
         </TextBox>
         <TextBox x:Name="PART_ShowText"
-                         Text="{Binding Text, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"                                            
+                         Text="{Binding Text, Mode=TwoWay, UpdateSourceTrigger=LostFocus}"                                            
                          Foreground="{Binding FontViewModel.FontColor,Converter={StaticResource ColorBrushConverter}}"
                          IsReadOnly="{Binding IsReadOnlyText}"
                          FontSize="{Binding FontViewModel.FontSize}" 
diff --git a/AIStudio.Wpf.DiagramDesigner/UserControls/TextControl.xaml.cs b/AIStudio.Wpf.DiagramDesigner/UserControls/TextControl.xaml.cs
index 96bdef3..b92eec2 100644
--- a/AIStudio.Wpf.DiagramDesigner/UserControls/TextControl.xaml.cs
+++ b/AIStudio.Wpf.DiagramDesigner/UserControls/TextControl.xaml.cs
@@ -75,8 +75,12 @@ namespace AIStudio.Wpf.DiagramDesigner
                     }
                     else if (selectable.IsSelected == false)
                     {
+                        BindingExpression binding = PART_ShowText.GetBindingExpression(TextBox.TextProperty);
+                        binding.UpdateSource();
+
                         PART_ShowText.Visibility = Visibility.Collapsed;
                         PART_TextBlock.Visibility = Visibility.Visible;
+                     
                         selectable.IsEditing = false;
                     }
                 }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs
index ded63d8..fef634c 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs
@@ -136,7 +136,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                     }
                     else
                     {
-                        DeleteLabel();
+                        ClearLabel();
                     }
                 }
             }
@@ -825,6 +825,12 @@ namespace AIStudio.Wpf.DiagramDesigner
             UpdatePathGeneratorResult();
         }
 
+        public void RemoveVertex(ConnectorVertexModel vertice)
+        {
+            Vertices.Remove(vertice);
+            UpdatePathGeneratorResult();
+        }
+
         protected override void ExecuteEditCommand(object param)
         {
             AddLabel();
@@ -841,7 +847,12 @@ namespace AIStudio.Wpf.DiagramDesigner
             label.UpdatePosition(paths);
         }
 
-        public void DeleteLabel()
+        public void RemoveLabel(ConnectorLabelModel label)
+        {
+            Labels.Remove(label);
+        }
+
+        public void ClearLabel()
         {
             Labels?.Clear();
         }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/ConnectorLabelModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/ConnectorLabelModel.cs
index ef9aced..36f4fc1 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/ConnectorLabelModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/ConnectorLabelModel.cs
@@ -182,14 +182,14 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         protected override void ClearText()
         {
-            Connector.Labels.Remove(this);
+            Connector.RemoveLabel(this);
         }
 
         private void DeleteLabel(object parameter)
         {
             if (parameter is ConnectorLabelModel label)
             {
-                Connector.Labels.Remove(label);
+                Connector.RemoveLabel(label);
             }
         }
 
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/ConnectorVertexModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/ConnectorVertexModel.cs
index 293c1e6..cfe1403 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/ConnectorVertexModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/ConnectorVertexModel.cs
@@ -78,7 +78,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             if (parameter is ConnectorVertexModel vertice)
             {
-                Connector.Vertices.Remove(vertice);
+                Connector.RemoveVertex(this);
             }
         }
 
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramOption.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramOption.cs
index 6552ddc..5384c9d 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramOption.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramOption.cs
@@ -92,11 +92,17 @@ namespace AIStudio.Wpf.DiagramDesigner
             get; set;
         } = e => e.KeyboardDevice.Modifiers == ModifierKeys.None && e.Key == Key.Down;
 
-        [Description("Group Keyboard shortcut (CTRL+Shift+G by default)")]
+        [Description("Group Keyboard shortcut (CTRL+G by default)")]
         public Func<KeyEventArgs, bool> Group
         {
             get; set;
         } = e => e.KeyboardDevice.Modifiers == ModifierKeys.Control && e.Key == Key.G;
 
+        [Description("Ungroup Keyboard shortcut (Shift+G by default)")]
+        public Func<KeyEventArgs, bool> Ungroup
+        {
+            get; set;
+        } = e => e.KeyboardDevice.Modifiers == ModifierKeys.Shift | e.Key == Key.G;
+
     }
 }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
index c676784..f5ec615 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
@@ -5,6 +5,7 @@ using System.ComponentModel;
 using System.Linq;
 using System.Reactive.Linq;
 using System.Windows;
+using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Media;
 using AIStudio.Wpf.DiagramDesigner.Geometrys;
@@ -1195,7 +1196,15 @@ namespace AIStudio.Wpf.DiagramDesigner
                 if (attr != null && attr.Length != 0)
                 {
                     //加入ReDo
-                    DoCommandManager.DoNewCommand(sender.ToString() + e.PropertyName, () => Do(sender, e.PropertyName, valuePropertyChangedEventArgs.NewValue), () => UnDo(sender, e.PropertyName, valuePropertyChangedEventArgs.OldValue), null, false);
+                    DoCommandManager.DoNewCommand(sender.ToString() + e.PropertyName,
+                        () => {
+                            Do(sender, e.PropertyName, valuePropertyChangedEventArgs.NewValue);
+                        },
+                        () => {
+                            UnDo(sender, e.PropertyName, valuePropertyChangedEventArgs.OldValue);
+                        },
+                        null,
+                        false);
 
                     Event?.Invoke(sender, new DiagramEventArgs(valuePropertyChangedEventArgs.PropertyName, valuePropertyChangedEventArgs.NewValue, valuePropertyChangedEventArgs.OldValue, selectable?.Id));
                 }
@@ -2480,7 +2489,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                     var oldcenter = BoundingRect.Center;
                     foreach (var item in selectedItems.OfType<DesignerItemViewModelBase>())
                     {
-                        item.Left = item.Left - oldcenter.X + PageSize.Width  / 2;
+                        item.Left = item.Left - oldcenter.X + PageSize.Width / 2;
                         item.Top = item.Top - oldcenter.Y + PageSize.Height / 2;
                     }
 
@@ -2541,7 +2550,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                     foreach (var item in infos)
                     {
                         item.Key.Size = item.Value;
-                    }                   
+                    }
                 });
             }
         }
@@ -2695,15 +2704,6 @@ namespace AIStudio.Wpf.DiagramDesigner
                 items = SelectedItems?.OfType<DesignerItemViewModelBase>().Where(p => p.ParentId == Guid.Empty).ToList();
             }
 
-            var groups = items.OfType<DesignerItemViewModelBase>().Where(p => p.IsGroup && p.ParentId == Guid.Empty).ToList();
-
-            //解除分组
-            if (groupItem == null && groups.Count > 0)
-            {
-                ExecuteUngroupCommand(groups);
-                return;
-            }
-
             RectangleBase rect = DiagramViewModelHelper.GetBoundingRectangle(items);
 
             if (groupItem == null)
@@ -2711,16 +2711,24 @@ namespace AIStudio.Wpf.DiagramDesigner
                 groupItem = new GroupDesignerItemViewModel();
             }
 
-            Add(groupItem, true);
+            DoCommandManager.DoNewCommand(this.ToString(),
+              () => {
+                  Add(groupItem);
+                  foreach (DesignerItemViewModelBase item in items)
+                      item.ParentId = groupItem.Id;
+                  groupItem.Resize();
+                  ClearSelectedItems();
+                  SelectionService.AddToSelection(groupItem);
+              },
+              () => {
+                  Remove(groupItem);
+                  foreach (DesignerItemViewModelBase item in items)
+                  {
+                      item.IsSelected = true;
+                      item.ParentId = Guid.Empty;
+                  }
+              });
 
-            foreach (DesignerItemViewModelBase item in items)
-                item.ParentId = groupItem.Id;
-
-            groupItem.Resize();
-
-            ClearSelectedItemsCommand.Execute(null);
-            //groupItem.IsSelected = true;
-            SelectionService.AddToSelection(groupItem);
         }
 
         private void ExecuteUngroupCommand(object parameter)
@@ -2728,22 +2736,45 @@ namespace AIStudio.Wpf.DiagramDesigner
             List<DesignerItemViewModelBase> groups;
             if (parameter is IEnumerable<DesignerItemViewModelBase> para)
             {
-                groups = para.ToList();
+                groups = para.Where(p => p.IsGroup && p.ParentId == Guid.Empty).ToList();
             }
             else
             {
                 groups = SelectedItems?.OfType<DesignerItemViewModelBase>().Where(p => p.IsGroup && p.ParentId == Guid.Empty).ToList();
             }
 
+            Dictionary<DesignerItemViewModelBase, Tuple<Guid, int>> items = new Dictionary<DesignerItemViewModelBase, Tuple<Guid, int>>();
             foreach (DesignerItemViewModelBase groupRoot in groups)
             {
                 var children = SelectedItems.OfType<DesignerItemViewModelBase>().Where(p => p.ParentId == groupRoot.Id);
                 foreach (DesignerItemViewModelBase child in children)
-                    child.ParentId = Guid.Empty;
-
-                RemoveItemCommand.Execute(groupRoot);
-                UpdateZIndex();
+                    items.Add(child, new Tuple<Guid, int>(child.ParentId, child.ZIndex));
             }
+
+            DoCommandManager.DoNewCommand(this.ToString(),
+            () => {
+                foreach (DesignerItemViewModelBase groupRoot in groups)
+                {
+                    Remove(groupRoot);                   
+                }
+                foreach (var item in items)
+                {
+                    item.Key.ParentId = Guid.Empty;
+                }
+                UpdateZIndex();
+            },
+            () => {
+                foreach (DesignerItemViewModelBase groupRoot in groups)
+                {
+                    Add(groupRoot);
+                }
+                foreach (var item in items)
+                {
+                    item.Key.ParentId = item.Value.Item1;
+                    item.Key.ZIndex = item.Value.Item2;
+                }
+            });
+           
         }
 
         private bool BelongToSameGroup(IGroupable item1, IGroupable item2)
@@ -2817,6 +2848,11 @@ namespace AIStudio.Wpf.DiagramDesigner
                 GroupCommand.Execute(null);
                 return true;
             }
+            else if (DiagramOption.ShortcutOption.Ungroup(e))
+            {
+                UngroupCommand.Execute(null);
+                return true;
+            }
 
             return false;
         }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/SelectableViewModelBase.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/SelectableViewModelBase.cs
index b096d55..928fd2d 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/SelectableViewModelBase.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/SelectableViewModelBase.cs
@@ -158,7 +158,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private bool _isSelected;
         [Browsable(false)]
-        [CanDo]
+        //[CanDo]
         public bool IsSelected
         {
             get
diff --git a/AIStudio.Wpf.Mind/ViewModels/MindNode.cs b/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
index e9a8ce7..70788e5 100644
--- a/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
+++ b/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
@@ -8,6 +8,7 @@ using System.Linq;
 using System.Security.Policy;
 using System.Text;
 using System.Text.RegularExpressions;
+using System.Threading;
 using System.Windows.Input;
 using System.Windows.Media;
 using AIStudio.Wpf.DiagramDesigner;
@@ -239,6 +240,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
         }
 
         private bool _isExpanded = true;
+        [CanDo]
         public bool IsExpanded
         {
             get
@@ -322,6 +324,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
 
         #region 附加信息属性
         private LinkInfo _linkInfo;
+        [CanDo]
         public LinkInfo LinkInfo
         {
             get
@@ -335,6 +338,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
         }
 
         private ImageInfo _imageInfo;
+        [CanDo]
         public ImageInfo ImageInfo
         {
             get
@@ -348,6 +352,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
         }
 
         private string _remark;
+        [CanDo]
         [Browsable(true)]
         public string Remark
         {
@@ -362,6 +367,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
         }
 
         private double? _priority;
+        [CanDo]
         public double? Priority
         {
             get
@@ -375,6 +381,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
         }
 
         private double? _rate;
+        [CanDo]
         public double? Rate
         {
             get
@@ -388,6 +395,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
         }
 
         private ObservableCollection<string> _tags;
+        [CanDo]
         public ObservableCollection<string> Tags
         {
             get
@@ -568,6 +576,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
         {
             if (GetLevel0Node()?.LayoutUpdating == true) return;
 
+            Interlocked.Increment(ref Root.DoCommandManager.BeginDo);
             switch (e.PropertyName)
             {
                 case nameof(Left):
@@ -591,6 +600,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
                 case nameof(ItemWidth):
                 case nameof(ItemHeight):
                     {
+                      
                         UpdatedLayout();
                         break;
                     }
@@ -608,6 +618,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
                         break;
                     }
             }
+            Interlocked.Decrement(ref Root.DoCommandManager.BeginDo);
         }
 
         protected override void FontViewModel_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)