diff --git a/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml b/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
index 97e9126..6ff6171 100644
--- a/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
+++ b/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
@@ -18,6 +18,7 @@
         xmlns:drop="urn:gong-wpf-dragdrop"             
         xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
         xmlns:converter="clr-namespace:AIStudio.Wpf.DiagramDesigner.Additionals.Converters;assembly=AIStudio.Wpf.DiagramDesigner.Additionals"
+        xmlns:mimd="clr-namespace:AIStudio.Wpf.Mind;assembly=AIStudio.Wpf.Mind"
         xmlns:viewmodel="clr-namespace:AIStudio.Wpf.DiagramApp.ViewModels"
         Style="{StaticResource RibbonWindowStyle}"
         Icon="pack://application:,,,/AIStudio.Wpf.DiagramApp;component/Icons/App.ico"
@@ -844,7 +845,7 @@
                                                 <iconPacks:PackIconMaterial Kind="VectorPolylineEdit" VerticalAlignment="Center" HorizontalAlignment="Center"/>
                                             </Setter.Value>
                                         </Setter>
-                                    </DataTrigger>                                  
+                                    </DataTrigger>
                                 </Style.Triggers>
                             </Style>
                         </Fluent:SplitButton.Style>
@@ -1142,7 +1143,7 @@
                                     Format="0 pt" />
                             </StackPanel>
                             <StackPanel>
-                                <TextBlock Text="箭头样式" Margin="5"/>                                
+                                <TextBlock Text="箭头样式" Margin="5"/>
                                 <StackPanel Orientation="Horizontal">
                                     <Fluent:ComboBox Size="Small" Width="140" Margin="5" IsEditable="False" helper:EnumHelper.Enum="{x:Type dd:ArrowPathStyle}" SelectedItem="{Binding ShapeViewModel.SourceMarker.PathStyle}">
                                         <Fluent:ComboBox.ItemTemplate>
@@ -1195,7 +1196,7 @@
                                         </Fluent:ComboBox.ItemTemplate>
                                     </Fluent:ComboBox>
 
-                                    
+
                                 </StackPanel>
                             </StackPanel>
                         </StackPanel>
@@ -1239,7 +1240,7 @@
                                             </DockPanel>
                                         </DataTemplate>
                                     </Fluent:ComboBox.ItemTemplate>
-                                </Fluent:ComboBox>                       
+                                </Fluent:ComboBox>
                             </StackPanel>
                             <StackPanel>
                                 <TextBlock Text="线条动画" Margin="5"/>
@@ -1573,7 +1574,7 @@
                                         <TextBlock Text="无" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                     </Border>
                                 </Fluent:ToggleButton.LargeIcon>
-                            </Fluent:ToggleButton>      
+                            </Fluent:ToggleButton>
                         </UniformGrid>
                         <Fluent:SplitButton.ToolTip>
                             <Fluent:ScreenTip Title="ShowGrid"
@@ -1709,7 +1710,7 @@
                                     </DataTrigger>
                                 </Style.Triggers>
                             </Style>
-                        </Fluent:SplitButton.Style>                      
+                        </Fluent:SplitButton.Style>
                         <Fluent:SplitButton.ToolTip>
                             <Fluent:ScreenTip Title="ShowGrid"
                                               Text="竖向对齐到网格方式"
@@ -1751,6 +1752,34 @@
                     </Fluent:SplitButton>
                 </Fluent:RibbonGroupBox>
             </Fluent:RibbonTabItem>
+            <Fluent:RibbonTabItem Header="脑图">
+                <Fluent:RibbonGroupBox Header="外观"
+                                       IsLauncherVisible="True">
+
+                    <Fluent:SplitButton Header="类型" Width="50" VerticalAlignment="Top">
+                        <Fluent:SplitButton.LargeIcon>
+                            <Grid>
+                                <iconPacks:PackIconMaterial Kind="FileOutline" VerticalAlignment="Center" HorizontalAlignment="Center"/>
+                                <TextBlock Text="S" VerticalAlignment="Center" HorizontalAlignment="Center" FontSize="9"/>
+                            </Grid>
+                        </Fluent:SplitButton.LargeIcon>
+                        <ListBox BorderThickness="0" helper:EnumHelper.Enum="{x:Type mimd:MindType}" SelectedItem="{Binding SelectedItem.MindType}">
+                            <ListBox.ItemTemplate>
+                                <DataTemplate>
+                                    <TextBlock Text="{Binding .,Converter={StaticResource EnumDescriptionConverter}}" Margin="5"/>
+                                </DataTemplate>
+                            </ListBox.ItemTemplate>
+                        </ListBox>
+                        <Fluent:SplitButton.ToolTip>
+                            <Fluent:ScreenTip Title="PageSize"
+                                              Text="页面大小"
+                                              Width="190" />
+                        </Fluent:SplitButton.ToolTip>
+                    </Fluent:SplitButton>
+
+                </Fluent:RibbonGroupBox>
+
+            </Fluent:RibbonTabItem>
             <Fluent:RibbonTabItem Header="帮助">
                 <Fluent:RibbonGroupBox>
                     <Fluent:SplitButton Header="指引" Width="50" VerticalAlignment="Top">
diff --git a/AIStudio.Wpf.DiagramDesigner/UserControls/ConnectorContainer.xaml.cs b/AIStudio.Wpf.DiagramDesigner/UserControls/ConnectorContainer.xaml.cs
index ee59ff4..f1b76c3 100644
--- a/AIStudio.Wpf.DiagramDesigner/UserControls/ConnectorContainer.xaml.cs
+++ b/AIStudio.Wpf.DiagramDesigner/UserControls/ConnectorContainer.xaml.cs
@@ -32,16 +32,19 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             if (e.Action == NotifyCollectionChangedAction.Add)
             {
-                foreach(var item in e.NewItems)
+                foreach (var item in e.NewItems)
                 {
                     FullyCreatedConnectorInfo vm = item as FullyCreatedConnectorInfo;
                     var connector = ItemContainerGenerator.ContainerFromItem(item) as ContentPresenter;
-
-                    Canvas.SetLeft(connector, vm.DataItem.ItemWidth * vm.XRatio - vm.ConnectorWidth / 2);
-                    Canvas.SetTop(connector, vm.DataItem.ItemHeight * vm.YRatio - vm.ConnectorHeight / 2);
+                    if (connector != null)
+                    {
+                        Canvas.SetLeft(connector, vm.DataItem.ItemWidth * vm.XRatio - vm.ConnectorWidth / 2);
+                        Canvas.SetTop(connector, vm.DataItem.ItemHeight * vm.YRatio - vm.ConnectorHeight / 2);
+                    }
                 }
-                //SetConnectorLocation();
+
             }
+            
         }
 
          void ConnectorContainer_SizeChanged(object sender, SizeChangedEventArgs e)
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs
index 1ebfc52..d9c4800 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs
@@ -464,7 +464,16 @@ namespace AIStudio.Wpf.DiagramDesigner
                             Labels.FirstOrDefault()?.AddToSelection(false);
                         }
                         break;
-
+                    case nameof(RouterMode):
+                        var routetype = GlobalType.AllTypes.Where(p => typeof(IRouter).IsAssignableFrom(p)).FirstOrDefault(p => p.Name == RouterMode);
+                        Router = routetype != null ? (System.Activator.CreateInstance(routetype) as IRouter) : new RouterNormal();
+                        UpdatePathGeneratorResult();
+                        break;
+                    case nameof(PathMode):
+                        var pathGeneratortype = GlobalType.AllTypes.Where(p => typeof(IPathGenerator).IsAssignableFrom(p)).FirstOrDefault(p => p.Name == PathMode);
+                        PathGenerator = pathGeneratortype != null ? (System.Activator.CreateInstance(pathGeneratortype) as IPathGenerator) : new ConnectingLineSmooth();
+                        UpdatePathGeneratorResult();
+                        break;
                 }
             }
             else if (sender is ShapeViewModel)
diff --git a/AIStudio.Wpf.Mind/Themes/MindNode.xaml b/AIStudio.Wpf.Mind/Themes/MindNode.xaml
index b2eef5f..44eac42 100644
--- a/AIStudio.Wpf.Mind/Themes/MindNode.xaml
+++ b/AIStudio.Wpf.Mind/Themes/MindNode.xaml
@@ -87,8 +87,15 @@
                         CornerRadius="{Binding CornerRadius,Converter={StaticResource DoubleToCornerRadius}}">
                 </Border>
             </Grid>
-            <ToggleButton IsChecked="{Binding IsExpanded}" Style="{StaticResource ExpandCollapseToggleStyle}" HorizontalAlignment="Left" Margin="-15,0,0,0" Visibility="{Binding Children.Count,Converter={StaticResource IntToVisibilityConverter}}"/>
+            <ToggleButton x:Name="toggle" IsChecked="{Binding IsExpanded}" Style="{StaticResource ExpandCollapseToggleStyle}" HorizontalAlignment="Left" Margin="-15,0,0,0" Visibility="{Binding Children.Count,Converter={StaticResource IntToVisibilityConverter}}"/>
         </Grid>
+        <ControlTemplate.Triggers>
+
+            <DataTrigger Binding="{Binding IsRightLayout}" Value="false">
+                <Setter TargetName="toggle" Property="HorizontalAlignment" Value="Right"/>
+                <Setter TargetName="toggle" Property="Margin" Value="0,0,-15,0"/>
+            </DataTrigger>
+        </ControlTemplate.Triggers>
     </ControlTemplate>
 
     <ControlTemplate x:Key="MindLevel3NodeStyle" TargetType="{x:Type ContentControl}">
@@ -115,8 +122,14 @@
 
                 </Border>
             </Grid>
-            <ToggleButton IsChecked="{Binding IsExpanded}" Style="{StaticResource ExpandCollapseToggleStyle}" HorizontalAlignment="Left" Margin="-15,0,0,0" Visibility="{Binding Children.Count,Converter={StaticResource IntToVisibilityConverter}}"/>
+            <ToggleButton x:Name="toggle" IsChecked="{Binding IsExpanded}" Style="{StaticResource ExpandCollapseToggleStyle}" HorizontalAlignment="Left" Margin="-15,0,0,0" Visibility="{Binding Children.Count,Converter={StaticResource IntToVisibilityConverter}}"/>
         </Grid>
+        <ControlTemplate.Triggers>
+            <DataTrigger Binding="{Binding IsRightLayout}" Value="false">
+                <Setter TargetName="toggle" Property="HorizontalAlignment" Value="Right"/>
+                <Setter TargetName="toggle" Property="Margin" Value="0,0,-15,0"/>
+            </DataTrigger>
+        </ControlTemplate.Triggers>
     </ControlTemplate>
 
     <Style x:Key="MindNodeStyle" TargetType="{x:Type ContentControl}">
diff --git a/AIStudio.Wpf.Mind/ViewModels/MindNode.cs b/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
index 9897081..61c8147 100644
--- a/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
+++ b/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
@@ -52,7 +52,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
         }
 
         private void LevelInit(bool init = false)
-        {
+        {           
             switch (NodeLevel)
             {
                 case NodeLevel.Level1:
@@ -60,8 +60,23 @@ namespace AIStudio.Wpf.Mind.ViewModels
                         ItemWidth = 110;
                         ItemHeight = 40;
                         this.ClearConnectors();
-                        var port = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.None, true) { XRatio = 0.5, YRatio = 0.5 };
-                        this.AddConnector(port);
+                        switch (MindType)
+                        {
+                            case MindType.Mind:
+                            case MindType.Logical:
+                                {
+                                    var port = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.None, true) { XRatio = 0.5, YRatio = 0.5 };
+                                    this.AddConnector(port);
+                                    break;
+                                }
+                            case MindType.Directory:
+                                {
+                                    var port = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Bottom, true) { XRatio = 0.5, YRatio = 1 };
+                                    this.AddConnector(port);
+                                    break;
+                                }
+                        }
+                      
                         IsInnerConnector = true;
 
                         ColorViewModel.FillColor.Color = Color.FromRgb(0x73, 0xa1, 0xbf);
@@ -79,10 +94,26 @@ namespace AIStudio.Wpf.Mind.ViewModels
                         ItemWidth = 80;
                         ItemHeight = 25;
                         this.ClearConnectors();
-                        var port1 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Left, true) { XRatio = 0, YRatio = 0.5 };
-                        this.AddConnector(port1);
-                        var port2 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Right, true) { XRatio = 1, YRatio = 0.5 };
-                        this.AddConnector(port2);
+                        switch (MindType)
+                        {
+                            case MindType.Mind:
+                            case MindType.Logical:
+                                {
+                                    var port1 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Left, true) { XRatio = 0, YRatio = 0.5 };
+                                    this.AddConnector(port1);
+                                    var port2 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Right, true) { XRatio = 1, YRatio = 0.5 };
+                                    this.AddConnector(port2);
+                                    break;
+                                }
+                            case MindType.Directory:
+                                {
+                                    var port1 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Top, true) { XRatio = 0.5, YRatio = 0 };
+                                    this.AddConnector(port1);
+                                    var port2 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Bottom, true) { XRatio = 0.25, YRatio = 1 };
+                                    this.AddConnector(port2);
+                                    break;
+                                }
+                        }
                         IsInnerConnector = true;
 
                         ColorViewModel.LineColor.Color = Color.FromRgb(0x73, 0xa1, 0xbf);
@@ -95,12 +126,29 @@ namespace AIStudio.Wpf.Mind.ViewModels
                         ItemWidth = 80;
                         ItemHeight = 25;
                         this.ClearConnectors();
-                        var port1 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Left, true) { XRatio = 0, YRatio = 1 };
-                        this.AddConnector(port1);
-                        var port2 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Right, true) { XRatio = 1, YRatio = 1 };
-                        this.AddConnector(port2);
-                        IsInnerConnector = true;
 
+                        switch (MindType)
+                        {
+                            case MindType.Mind:
+                            case MindType.Logical:
+                                {
+                                    var port1 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Left, true) { XRatio = 0, YRatio = 1 };
+                                    this.AddConnector(port1);
+                                    var port2 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Right, true) { XRatio = 1, YRatio = 1 };
+                                    this.AddConnector(port2);            
+                                    break;
+                                }
+                            case MindType.Directory:
+                                {
+                                    var port1 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Left, true) { XRatio = 0, YRatio = 0.5 };
+                                    this.AddConnector(port1);
+                                    var port2 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Bottom, true) { XRatio = 0.25, YRatio = 1 };
+                                    this.AddConnector(port2);
+                                    break;
+                                }
+                        }
+
+                        IsInnerConnector = true;
                         ColorViewModel.LineColor.Color = Color.FromRgb(0x73, 0xa1, 0xbf);
                         ShapeViewModel.SinkMarker.PathStyle = ArrowPathStyle.None;
                         ShapeViewModel.SinkMarker.SizeStyle = ArrowSizeStyle.VerySmall;
@@ -155,17 +203,26 @@ namespace AIStudio.Wpf.Mind.ViewModels
             {
                 SetProperty(ref _isExpanded, value);
             }
-        }   
+        }
 
         public SizeBase Spacing
         {
             get; set;
         } = new SizeBase(15, 15);
 
-        public List<MindNode> Children
+
+        private ObservableCollection<MindNode> _children = new ObservableCollection<MindNode>();
+        public ObservableCollection<MindNode> Children
         {
-            get; set;
-        } = new List<MindNode>();
+            get
+            {
+                return _children;
+            }
+            set
+            {
+                SetProperty(ref _children, value);
+            }
+        }
 
         public SizeBase SizeWithSpacing
         {
@@ -190,7 +247,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
             get; set;
         }
 
-        private MindType _mindType;
+        private MindType _mindType = MindType.Directory;
         public MindType MindType
         {
             get
@@ -203,9 +260,20 @@ namespace AIStudio.Wpf.Mind.ViewModels
             }
         }
 
-        private bool _layoutUpdating;
-
         private bool _isRightLayout = true;
+        public bool IsRightLayout
+        {
+            get
+            {
+                return _isRightLayout;
+            }
+            set
+            {
+                SetProperty(ref _isRightLayout, value);
+            }
+        }
+
+        private bool _layoutUpdating;
         #endregion
 
         #region 附加信息属性
@@ -274,8 +342,8 @@ namespace AIStudio.Wpf.Mind.ViewModels
             }
         }
 
-        private List<string> _tags;
-        public List<string> Tags
+        private ObservableCollection<string> _tags;
+        public ObservableCollection<string> Tags
         {
             get
             {
@@ -481,7 +549,18 @@ namespace AIStudio.Wpf.Mind.ViewModels
             item.Parent = this;
             Root?.DirectAddItemCommand.Execute(item);
 
-            ConnectionViewModel connector = new ConnectionViewModel(Root, this.Connectors.FirstOrDefault(), item.Connectors.FirstOrDefault());
+            DrawMode drawMode = DrawMode.ConnectingLineSmooth;
+            RouterMode routerMode = AIStudio.Wpf.DiagramDesigner.RouterMode.RouterNormal;
+            switch (MindType)
+            {
+                case MindType.Directory:
+                    drawMode = DrawMode.ConnectingLineStraight;
+                    routerMode = AIStudio.Wpf.DiagramDesigner.RouterMode.RouterOrthogonal;
+                    break;
+
+            }
+
+            ConnectionViewModel connector = new ConnectionViewModel(Root, this.Connectors.FirstOrDefault(), item.Connectors.FirstOrDefault(), drawMode, routerMode);
             connector.ColorViewModel.LineColor = this.ColorViewModel.LineColor;
             connector.SmoothMargin = 20;
             connector.SmoothAutoSlope = 0.2;
@@ -526,7 +605,15 @@ namespace AIStudio.Wpf.Mind.ViewModels
                 case nameof(ItemWidth):
                 case nameof(ItemHeight):
                 case nameof(MindType):
-                    GetLevel1Node()?.LayoutUpdated();
+                    if (NodeLevel == NodeLevel.Level1)
+                    {
+                        LevelInit();
+                        LayoutUpdated();
+                    }
+                    else
+                    {
+                        GetLevel1Node().MindType = MindType;
+                    }
                     break;
                 case nameof(NodeLevel):
                     LevelInit();
@@ -620,7 +707,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
 
         protected SizeBase MeasureOverride(bool isExpanded = true)
         {
-            switch (MindType)
+            switch (GetLevel1Node()?.MindType)
             {
                 case MindType.Mind:
                     {
@@ -630,11 +717,11 @@ namespace AIStudio.Wpf.Mind.ViewModels
                             if (NodeLevel == NodeLevel.Level1)
                             {
                                 var rights = Children.Where((p, index) => index % 2 == 0).ToList();
-                                rights.ForEach(p => p._isRightLayout = true);
+                                rights.ForEach(p => p.IsRightLayout = true);
                                 var rightsizes = rights.Select(p => p.MeasureOverride(IsExpanded && isExpanded)).ToArray();
 
                                 var lefts = Children.Where((p, index) => index % 2 == 1).ToList();
-                                lefts.ForEach(p => p._isRightLayout = false);
+                                lefts.ForEach(p => p.IsRightLayout = false);
                                 var leftsizes = lefts.Select(p => p.MeasureOverride(IsExpanded && isExpanded)).ToArray();
                                 sizewithSpacing = new SizeBase(sizewithSpacing.Width + rightsizes.Max(p => p.Width) + +leftsizes.Max(p => p.Width), Math.Max(sizewithSpacing.Height, Math.Max(rightsizes.Sum(p => p.Height), leftsizes.Sum(p => p.Height))));
                             }
@@ -664,6 +751,28 @@ namespace AIStudio.Wpf.Mind.ViewModels
                         connectors?.ForEach(p => p.Visible = Visible);
                         break;
                     }
+                case MindType.Directory:
+                    {
+                        var sizewithSpacing = SizeWithSpacing;
+                        if (Children?.Count > 0)
+                        {
+                            if (NodeLevel == NodeLevel.Level1)
+                            {
+                                var childrensizes = Children.Select(p => p.MeasureOverride(IsExpanded && isExpanded)).ToArray();
+                                sizewithSpacing = new SizeBase(Math.Max(sizewithSpacing.Width, childrensizes.Sum(p => p.Width)), sizewithSpacing.Height + childrensizes.Max(p => p.Height));
+                            }
+                            else
+                            {
+                                var childrensizes = Children.Select(p => p.MeasureOverride(IsExpanded && isExpanded)).ToArray();
+                                sizewithSpacing = new SizeBase(sizewithSpacing.Width * 0.5 + childrensizes.Max(p => p.Width), sizewithSpacing.Height + childrensizes.Sum(p => p.Height));
+                            }
+                        }
+                        DesiredSize = isExpanded ? sizewithSpacing : new SizeBase(0, 0);
+                        Visible = isExpanded;
+                        var connectors = Root?.Items.OfType<ConnectionViewModel>().Where(p => p.SinkConnectorInfoFully?.DataItem == this).ToList();
+                        connectors?.ForEach(p => p.Visible = Visible);
+                        break;
+                    }
                 default:
                     {
                         var sizewithSpacing = SizeWithSpacing;
@@ -684,7 +793,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
 
         protected void ArrangeOverride()
         {
-            switch (MindType)
+            switch (GetLevel1Node()?.MindType)
             {
                 case MindType.Mind:
                     {
@@ -692,7 +801,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
                         {
                             if (Children?.Count > 0)
                             {
-                                var rights = Children.Where(p => p._isRightLayout == true).ToList();
+                                var rights = Children.Where(p => p.IsRightLayout == true).ToList();
                                 double left = MiddlePosition.X + ItemWidth / 2 + Spacing.Width;
                                 double lefttop = MiddlePosition.Y - Math.Min(DesiredSize.Height, rights.Sum(p => p.DesiredSize.Height)) / 2;
                                 foreach (var child in rights)
@@ -705,12 +814,12 @@ namespace AIStudio.Wpf.Mind.ViewModels
                                     child.ArrangeOverride();
                                 }
 
-                                var lefts = Children.Where(p => p._isRightLayout == false).ToList();
+                                var lefts = Children.Where(p => p.IsRightLayout == false).ToList();
                                 double right = MiddlePosition.X - ItemWidth / 2 - Spacing.Width;
-                                double righttop = MiddlePosition.Y - Math.Min(DesiredSize.Height, lefts.Sum(p => p.DesiredSize.Height)) / 2;                              
+                                double righttop = MiddlePosition.Y - Math.Min(DesiredSize.Height, lefts.Sum(p => p.DesiredSize.Height)) / 2;
                                 foreach (var child in lefts)
                                 {
-                                    child.Left = right - child.Spacing.Width - child.ItemWidth + child.Offset.X ;
+                                    child.Left = right - child.Spacing.Width - child.ItemWidth + child.Offset.X;
                                     child.Top = righttop + child.DesiredSize.Height / 2 - child.ItemHeight / 2 + child.Offset.Y;
                                     child.DesiredPosition = child.Position;
                                     righttop += child.DesiredSize.Height;
@@ -721,7 +830,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
                         }
                         else
                         {
-                            if (GetLevel2Node()._isRightLayout)
+                            if (GetLevel2Node().IsRightLayout)
                             {
                                 double left = MiddlePosition.X + ItemWidth / 2 + Spacing.Width;
                                 double top = MiddlePosition.Y - Math.Min(DesiredSize.Height, Children.Sum(p => p.DesiredSize.Height)) / 2;
@@ -776,6 +885,44 @@ namespace AIStudio.Wpf.Mind.ViewModels
                         }
                         break;
                     }
+                case MindType.Directory:
+                    {
+                        if (NodeLevel == NodeLevel.Level1)
+                        {
+                            double left = MiddlePosition.X - Math.Max(DesiredSize.Width, Children.Sum(p => p.DesiredSize.Width)) / 2;
+                            double top = MiddlePosition.Y + ItemHeight / 2 + Spacing.Height;
+                            if (Children?.Count > 0)
+                            {
+                                foreach (var child in Children)
+                                {
+                                    child.Left = left + child.Spacing.Width + child.Offset.X;
+                                    child.Top = top + child.Spacing.Height + child.Offset.Y;
+                                    child.DesiredPosition = child.Position;
+                                    left += child.DesiredSize.Width;
+
+                                    child.ArrangeOverride();
+                                }
+                            }
+                        }
+                        else
+                        {
+                            double left = MiddlePosition.X;
+                            double top = MiddlePosition.Y + ItemHeight / 2 + Spacing.Height;
+                            if (Children?.Count > 0)
+                            {
+                                foreach (var child in Children)
+                                {
+                                    child.Left = left + child.Offset.X;
+                                    child.Top = top + child.Spacing.Height + child.Offset.Y;
+                                    child.DesiredPosition = child.Position;
+                                    top += child.DesiredSize.Height;
+
+                                    child.ArrangeOverride();
+                                }
+                            }
+                        }
+                        break;
+                    }
                 default:
                     {
                         break;