diff --git a/locals/UI.csv b/locals/UI.csv
index 0f22d2d..8bee363 100644
--- a/locals/UI.csv
+++ b/locals/UI.csv
@@ -9,7 +9,7 @@ jump,跳跃,Jump,飛
 throw,抛出,Throw a ,ほうしゅつ
 use_item,使用,Use,しよう
 jump_down,跳下平台,Jump off platform,踊り場から飛び降ります
-de,的,'s,の
+de,的,"'s",の
 default_player_name,白纸,blankPaper,しらかみ
 item_prompt_debug,ID：{0}\n名称：{1}\n数量：{2}\n最大叠加数量：{3}\n数据类型：{4}\n描述：{5},ID: {0}\nName: {1}\nQuantity: {2}\nMaximum stacking quantity: {3}\nData type: {4}\nDescription：{5},id:{0}\n名称:{1}\nの数は最大{2}\nシナジー数:{3}\nデータタイプ:{4}\n述べ表わす:{5}
 level_graph_editor,关卡图编辑器,Level graph editor,ステージマップエディター
@@ -25,4 +25,5 @@ line_errors_must_start_with_res,位于{0}错误，必须以res://开头。,"Loca
 open_the_export_directory,打开导出目录,Open the export directory,エクスポートディレクトリを開きます
 save,保存,Save,保留
 filename,文件名,File name,ファイル名
-cancel,取消,Cancel,キャンセル
\ No newline at end of file
+cancel,取消,Cancel,キャンセル
+load,加载,Load,ろーど
\ No newline at end of file
diff --git a/locals/UI.en.translation b/locals/UI.en.translation
index 7add425..aed4396 100644
Binary files a/locals/UI.en.translation and b/locals/UI.en.translation differ
diff --git a/locals/UI.jp.translation b/locals/UI.jp.translation
index b887b84..9b74fe8 100644
Binary files a/locals/UI.jp.translation and b/locals/UI.jp.translation differ
diff --git a/locals/UI.zh.translation b/locals/UI.zh.translation
index b5dd9ce..9774ac0 100644
Binary files a/locals/UI.zh.translation and b/locals/UI.zh.translation differ
diff --git a/project.godot b/project.godot
index eecff5d..93617b2 100644
--- a/project.godot
+++ b/project.godot
@@ -147,6 +147,7 @@ hotbar_previous={
 [internationalization]
 
 locale/translations=PackedStringArray("res://locals/UI.en.translation", "res://locals/UI.zh.translation", "res://locals/Error.zh.translation", "res://locals/Error.en.translation", "res://locals/slogan.en.translation", "res://locals/slogan.zh.translation", "res://locals/Log.en.translation", "res://locals/Log.zh.translation", "res://locals/Weapon.en.translation", "res://locals/Weapon.zh.translation", "res://locals/InputMapping.en.translation", "res://locals/InputMapping.zh.translation", "res://locals/Error.jp.translation", "res://locals/InputMapping.jp.translation", "res://locals/Log.jp.translation", "res://locals/slogan.jp.translation", "res://locals/UI.jp.translation", "res://locals/Weapon.jp.translation")
+locale/test="jp"
 
 [layer_names]
 
diff --git a/scenes/LevelGraphEditor.tscn b/scenes/LevelGraphEditor.tscn
index 70a343e..764c724 100644
--- a/scenes/LevelGraphEditor.tscn
+++ b/scenes/LevelGraphEditor.tscn
@@ -156,10 +156,14 @@ grow_horizontal = 0
 layout_mode = 2
 text = "open_the_export_directory"
 
-[node name="SaveButton" type="Button" parent="HBoxContainer"]
+[node name="ShowSavePanelButton" type="Button" parent="HBoxContainer"]
 layout_mode = 2
 text = "save"
 
+[node name="ShowLoadPanelButton" type="Button" parent="HBoxContainer"]
+layout_mode = 2
+text = "load"
+
 [node name="ShowCreateRoomPanelButton" type="Button" parent="HBoxContainer"]
 layout_mode = 2
 text = "create_room"
@@ -168,7 +172,7 @@ text = "create_room"
 layout_mode = 2
 text = "close"
 
-[node name="SaveOrloadPanel" type="Panel" parent="."]
+[node name="SaveOrLoadPanel" type="Panel" parent="."]
 visible = false
 layout_mode = 1
 anchors_preset = 15
@@ -181,7 +185,7 @@ offset_bottom = -155.0
 grow_horizontal = 2
 grow_vertical = 2
 
-[node name="Label" type="Label" parent="SaveOrloadPanel"]
+[node name="SaveOrLoadPanelTitleLabel" type="Label" parent="SaveOrLoadPanel"]
 layout_mode = 1
 anchors_preset = 5
 anchor_left = 0.5
@@ -193,7 +197,7 @@ offset_bottom = 40.0
 grow_horizontal = 2
 text = "save"
 
-[node name="LineEdit" type="LineEdit" parent="SaveOrloadPanel"]
+[node name="FileNameLineEdit" type="LineEdit" parent="SaveOrLoadPanel"]
 layout_mode = 1
 anchors_preset = 14
 anchor_top = 0.5
@@ -206,7 +210,7 @@ offset_bottom = 28.0
 grow_horizontal = 2
 grow_vertical = 2
 
-[node name="Label2" type="Label" parent="SaveOrloadPanel"]
+[node name="Label" type="Label" parent="SaveOrLoadPanel"]
 layout_mode = 1
 anchors_preset = 4
 anchor_top = 0.5
@@ -218,7 +222,7 @@ offset_bottom = -13.0
 grow_vertical = 2
 text = "filename"
 
-[node name="HBoxContainer" type="HBoxContainer" parent="SaveOrloadPanel"]
+[node name="HBoxContainer" type="HBoxContainer" parent="SaveOrLoadPanel"]
 layout_mode = 1
 anchors_preset = 3
 anchor_left = 1.0
@@ -232,10 +236,10 @@ offset_bottom = -10.0
 grow_horizontal = 0
 grow_vertical = 0
 
-[node name="CancelButton" type="Button" parent="SaveOrloadPanel/HBoxContainer"]
+[node name="CancelButton" type="Button" parent="SaveOrLoadPanel/HBoxContainer"]
 layout_mode = 2
 text = "cancel"
 
-[node name="ActionButton" type="Button" parent="SaveOrloadPanel/HBoxContainer"]
+[node name="ActionButton" type="Button" parent="SaveOrLoadPanel/HBoxContainer"]
 layout_mode = 2
 text = "save"
diff --git a/scripts/levelGraphEditor/IRoomNodeData.cs b/scripts/levelGraphEditor/IRoomNodeData.cs
deleted file mode 100644
index c919967..0000000
--- a/scripts/levelGraphEditor/IRoomNodeData.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-namespace ColdMint.scripts.levelGraphEditor;
-
-public interface IRoomNodeData
-{
-    string? Id { get; set; }
-
-    /// <summary>
-    /// <para>Title</para>
-    /// <para>标题</para>
-    /// </summary>
-    string? Title { get; set; }
-
-    /// <summary>
-    /// <para>描述</para>
-    /// <para>Description</para>
-    /// </summary>
-    string? Description { get; set; }
-}
\ No newline at end of file
diff --git a/scripts/levelGraphEditor/LevelGraphEditorSaveData.cs b/scripts/levelGraphEditor/LevelGraphEditorSaveData.cs
index 566ae3c..240c43e 100644
--- a/scripts/levelGraphEditor/LevelGraphEditorSaveData.cs
+++ b/scripts/levelGraphEditor/LevelGraphEditorSaveData.cs
@@ -10,5 +10,5 @@ public class LevelGraphEditorSaveData
 {
     public List<ConnectionData>? ConnectionDataList { get; set; }
 
-    public List<IRoomNodeData>? RoomNodeDataList { get; set; }
+    public List<RoomNodeData>? RoomNodeDataList { get; set; }
 }
\ No newline at end of file
diff --git a/scripts/levelGraphEditor/RoomNode.cs b/scripts/levelGraphEditor/RoomNode.cs
index 4b99858..de40f56 100644
--- a/scripts/levelGraphEditor/RoomNode.cs
+++ b/scripts/levelGraphEditor/RoomNode.cs
@@ -5,9 +5,9 @@ namespace ColdMint.scripts.levelGraphEditor;
 public partial class RoomNode : GraphNode
 {
     private Label? _describeLabel;
-    private IRoomNodeData? _roomNodeData;
+    private RoomNodeData? _roomNodeData;
 
-    public IRoomNodeData? RoomNodeData
+    public RoomNodeData? RoomNodeData
     {
         get => _roomNodeData;
         set
diff --git a/scripts/levelGraphEditor/RoomNodeData.cs b/scripts/levelGraphEditor/RoomNodeData.cs
index 8bcb935..0b92f0f 100644
--- a/scripts/levelGraphEditor/RoomNodeData.cs
+++ b/scripts/levelGraphEditor/RoomNodeData.cs
@@ -1,6 +1,6 @@
 namespace ColdMint.scripts.levelGraphEditor;
 
-public class RoomNodeData : IRoomNodeData
+public class RoomNodeData
 {
     public string? Id { get; set; }
     public string? Title { get; set; }
diff --git a/scripts/loader/uiLoader/LevelGraphEditorLoader.cs b/scripts/loader/uiLoader/LevelGraphEditorLoader.cs
index de299cb..4dc8992 100644
--- a/scripts/loader/uiLoader/LevelGraphEditorLoader.cs
+++ b/scripts/loader/uiLoader/LevelGraphEditorLoader.cs
@@ -31,12 +31,37 @@ public partial class LevelGraphEditorLoader : UiLoaderTemplate
     private Button? _createRoomButton;
     private Button? _returnButton;
     private string? _defaultRoomName;
+
+    /// <summary>
+    /// <para>Index of the room</para>
+    /// <para>房间的索引</para>
+    /// </summary>
     private int _roomIndex = 1;
+
     private TextEdit? _roomTemplateCollectionTextEdit;
     private Label? _roomTemplateTipsLabel;
-    private Button? _saveButton;
+    private Button? _showSavePanelButton;
     private Button? _openExportFolderButton;
     private HBoxContainer? _hBoxContainer;
+    private Panel? _saveOrLoadPanel;
+    private Button? _cancelButton;
+    private Button? _actionButton;
+    private Label? _saveOrLoadPanelTitleLabel;
+    private LineEdit? _fileNameLineEdit;
+    private Button? _showLoadPanelButton;
+
+    /// <summary>
+    /// <para>Offset to append when a new node is created.</para>
+    /// <para>创建新节点时追加的偏移量。</para>
+    /// </summary>
+    private Vector2 _positionOffset = new Vector2(100, 100);
+
+    /// <summary>
+    /// <para>Is the press event of an active button saved?</para>
+    /// <para>活动按钮的按下事件是否为保存？</para>
+    /// </summary>
+    private bool _saveMode;
+
 
     public override void InitializeData()
     {
@@ -68,8 +93,14 @@ public partial class LevelGraphEditorLoader : UiLoaderTemplate
             _openExportFolderButton.Visible = ExplorerUtils.SupportOpenDirectory();
         }
 
+        _showLoadPanelButton = GetNode<Button>("HBoxContainer/ShowLoadPanelButton");
+        _saveOrLoadPanelTitleLabel = GetNode<Label>("SaveOrLoadPanel/SaveOrLoadPanelTitleLabel");
+        _saveOrLoadPanel = GetNode<Panel>("SaveOrLoadPanel");
+        _fileNameLineEdit = GetNode<LineEdit>("SaveOrLoadPanel/FileNameLineEdit");
+        _actionButton = GetNode<Button>("SaveOrLoadPanel/HBoxContainer/ActionButton");
+        _cancelButton = GetNode<Button>("SaveOrLoadPanel/HBoxContainer/CancelButton");
         _hBoxContainer = GetNode<HBoxContainer>("HBoxContainer");
-        _saveButton = GetNode<Button>("HBoxContainer/SaveButton");
+        _showSavePanelButton = GetNode<Button>("HBoxContainer/ShowSavePanelButton");
         _roomTemplateCollectionTextEdit = GetNode<TextEdit>("CreateOrEditorPanel/RoomTemplateCollectionTextEdit");
         _graphEdit = GetNode<GraphEdit>("GraphEdit");
         _showCreateRoomPanelButton = GetNode<Button>("HBoxContainer/ShowCreateRoomPanelButton");
@@ -87,28 +118,29 @@ public partial class LevelGraphEditorLoader : UiLoaderTemplate
     /// </summary>
     /// <param name="roomNodeData"></param>
     /// <returns></returns>
-    private bool CreateRoomNode(IRoomNodeData roomNodeData)
+    private RoomNode? CreateRoomNode(RoomNodeData roomNodeData)
     {
         if (_roomNodeScene == null || _graphEdit == null)
         {
-            return false;
+            return null;
         }
 
         var node = _roomNodeScene.Instantiate();
         if (node == null)
         {
-            return false;
+            return null;
         }
 
         _graphEdit?.AddChild(node);
         if (node is not RoomNode roomNode)
         {
-            return false;
+            return null;
         }
 
         roomNode.RoomNodeData = roomNodeData;
+        roomNode.PositionOffset = _positionOffset * _roomIndex;
         _roomIndex++;
-        return true;
+        return roomNode;
     }
 
     public override void LoadUiActions()
@@ -247,113 +279,319 @@ public partial class LevelGraphEditorLoader : UiLoaderTemplate
                     Title = _roomNameLineEdit.Text,
                     Description = _roomDescriptionLineEdit.Text
                 };
-                var result = CreateRoomNode(roomNodeData);
-                if (result)
+                var roomNode = CreateRoomNode(roomNodeData);
+                if (roomNode != null)
                 {
                     HideCreateRoomPanel();
                 }
             };
         }
 
-        if (_saveButton != null)
+        if (_cancelButton != null)
         {
-            _saveButton.Pressed += () =>
+            _cancelButton.Pressed += () =>
             {
-                if (_graphEdit == null)
+                if (_saveOrLoadPanel != null)
+                {
+                    _saveOrLoadPanel.Visible = false;
+                }
+            };
+        }
+
+        if (_actionButton != null)
+        {
+            _actionButton.Pressed += () =>
+            {
+                if (_saveOrLoadPanel != null)
+                {
+                    _saveOrLoadPanel.Visible = false;
+                }
+            };
+        }
+
+        if (_showLoadPanelButton != null)
+        {
+            _showLoadPanelButton.Pressed += () =>
+            {
+                if (_saveOrLoadPanel != null)
+                {
+                    _saveOrLoadPanel.Visible = true;
+                }
+
+                if (_actionButton != null)
+                {
+                    _actionButton.Text = TranslationServer.Translate("load");
+                }
+
+                if (_fileNameLineEdit != null)
+                {
+                    _fileNameLineEdit.Text = string.Empty;
+                }
+
+                if (_saveOrLoadPanelTitleLabel != null)
+                {
+                    _saveOrLoadPanelTitleLabel.Text = TranslationServer.Translate("load");
+                }
+
+                _saveMode = false;
+            };
+        }
+
+        if (_showSavePanelButton != null)
+        {
+            _showSavePanelButton.Pressed += () =>
+            {
+                if (_saveOrLoadPanel != null)
+                {
+                    _saveOrLoadPanel.Visible = true;
+                }
+
+                if (_actionButton != null)
+                {
+                    _actionButton.Text = TranslationServer.Translate("save");
+                }
+
+                if (_fileNameLineEdit != null)
+                {
+                    _fileNameLineEdit.Text = string.Empty;
+                }
+
+                if (_saveOrLoadPanelTitleLabel != null)
+                {
+                    _saveOrLoadPanelTitleLabel.Text = TranslationServer.Translate("save");
+                }
+
+                _saveMode = true;
+            };
+        }
+
+        if (_actionButton != null)
+        {
+            _actionButton.Pressed += () =>
+            {
+                if (_fileNameLineEdit == null)
                 {
                     return;
                 }
 
-                var levelGraphEditorSaveData = new LevelGraphEditorSaveData();
-                //Serialize room node information
-                //序列化房间节点信息
-                var length = _graphEdit.GetChildCount();
-                if (length <= 0)
+                var fileName = _fileNameLineEdit.Text;
+                if (string.IsNullOrEmpty(fileName))
                 {
-                    //no room
-                    //没有房间
                     return;
                 }
 
-                var roomNodeDataList = new List<IRoomNodeData>();
-                levelGraphEditorSaveData.RoomNodeDataList = roomNodeDataList;
-                for (var i = 0; i < length; i++)
+                if (_saveMode)
                 {
-                    var node = _graphEdit.GetChild(i);
-                    if (node is not RoomNode roomNode) continue;
-                    var data = roomNode.RoomNodeData;
-                    if (data == null)
-                    {
-                        continue;
-                    }
-
-                    roomNodeDataList.Add(data);
+                    SaveFile(fileName);
                 }
 
-                //Serialized connection information
-                //序列化连接信息
-                Array<Dictionary> connectionList = _graphEdit.GetConnectionList();
-                var connectionDataList = new List<ConnectionData>();
-                levelGraphEditorSaveData.ConnectionDataList = connectionDataList;
-                if (connectionList.Count > 0)
+                else
                 {
-                    foreach (var dictionary in connectionList)
-                    {
-                        if (dictionary == null)
-                        {
-                            continue;
-                        }
-
-                        var keys = dictionary.Keys;
-                        if (keys.Count == 0)
-                        {
-                            continue;
-                        }
-
-                        var connectionData = new ConnectionData();
-                        foreach (var variant in keys)
-                        {
-                            var typeStr = variant.ToString();
-                            switch (typeStr)
-                            {
-                                case "from_node":
-                                    var fromRoomNodeData = GetRoomNodeData(dictionary[variant].AsString());
-                                    if (fromRoomNodeData == null)
-                                    {
-                                        continue;
-                                    }
-
-                                    connectionData.FromId = fromRoomNodeData.Id;
-                                    break;
-                                case "from_port":
-                                    connectionData.FromPort = dictionary[variant].AsInt32();
-                                    break;
-                                case "to_node":
-                                    var toRoomNodeData = GetRoomNodeData(dictionary[variant].AsString());
-                                    if (toRoomNodeData == null)
-                                    {
-                                        continue;
-                                    }
-
-                                    connectionData.ToId = toRoomNodeData.Id;
-                                    break;
-                                case "to_port":
-                                    connectionData.ToPort = dictionary[variant].AsInt32();
-                                    break;
-                            }
-                        }
-
-                        connectionDataList.Add(connectionData);
-                    }
+                    LoadFile(fileName);
                 }
-
-                var filePath = Path.Join(Config.GetLevelGraphExportDirectory(), GuidUtils.GetGuid() + ".json");
-                File.WriteAllText(filePath, JsonSerialization.Serialize(levelGraphEditorSaveData));
             };
         }
     }
 
 
+    /// <summary>
+    /// <para>save file</para>
+    /// <para>保存文件</para>
+    /// </summary>
+    /// <param name="fileName">
+    ///<para>filename</para>
+    ///<para>文件名</para>
+    /// </param>
+    private async void SaveFile(string fileName)
+    {
+        if (_graphEdit == null)
+        {
+            return;
+        }
+
+        var levelGraphEditorSaveData = new LevelGraphEditorSaveData();
+        //Serialize room node information
+        //序列化房间节点信息
+        var length = _graphEdit.GetChildCount();
+        if (length <= 0)
+        {
+            //no room
+            //没有房间
+            return;
+        }
+
+        var roomNodeDataList = new List<RoomNodeData>();
+        levelGraphEditorSaveData.RoomNodeDataList = roomNodeDataList;
+        for (var i = 0; i < length; i++)
+        {
+            var node = _graphEdit.GetChild(i);
+            if (node is not RoomNode roomNode) continue;
+            var data = roomNode.RoomNodeData;
+            if (data == null)
+            {
+                continue;
+            }
+
+            roomNodeDataList.Add(data);
+        }
+
+        //Serialized connection information
+        //序列化连接信息
+        Array<Dictionary> connectionList = _graphEdit.GetConnectionList();
+        var connectionDataList = new List<ConnectionData>();
+        levelGraphEditorSaveData.ConnectionDataList = connectionDataList;
+        if (connectionList.Count > 0)
+        {
+            foreach (var dictionary in connectionList)
+            {
+                if (dictionary == null)
+                {
+                    continue;
+                }
+
+                var keys = dictionary.Keys;
+                if (keys.Count == 0)
+                {
+                    continue;
+                }
+
+                var connectionData = new ConnectionData();
+                foreach (var variant in keys)
+                {
+                    var typeStr = variant.ToString();
+                    switch (typeStr)
+                    {
+                        case "from_node":
+                            var fromRoomNodeData = GetRoomNodeData(dictionary[variant].AsString());
+                            if (fromRoomNodeData == null)
+                            {
+                                continue;
+                            }
+
+                            connectionData.FromId = fromRoomNodeData.Id;
+                            break;
+                        case "from_port":
+                            connectionData.FromPort = dictionary[variant].AsInt32();
+                            break;
+                        case "to_node":
+                            var toRoomNodeData = GetRoomNodeData(dictionary[variant].AsString());
+                            if (toRoomNodeData == null)
+                            {
+                                continue;
+                            }
+
+                            connectionData.ToId = toRoomNodeData.Id;
+                            break;
+                        case "to_port":
+                            connectionData.ToPort = dictionary[variant].AsInt32();
+                            break;
+                    }
+                }
+
+                connectionDataList.Add(connectionData);
+            }
+        }
+
+        var filePath = Path.Join(Config.GetLevelGraphExportDirectory(), FileNameToActualName(fileName));
+        await File.WriteAllTextAsync(filePath, JsonSerialization.Serialize(levelGraphEditorSaveData));
+    }
+
+    /// <summary>
+    /// <para>Filename to real name</para>
+    /// <para>文件名到真实名称</para>
+    /// </summary>
+    /// <param name="fileName">
+    ///<para>If the filename does not have a file format, add the file format.</para>
+    ///<para>若文件名没有文件格式，那么加上文件格式。</para>
+    /// </param>
+    /// <returns></returns>
+    private string FileNameToActualName(string fileName)
+    {
+        string actualName;
+        if (fileName.EndsWith(".json"))
+        {
+            actualName = fileName;
+        }
+        else
+        {
+            actualName = fileName + ".json";
+        }
+
+        return actualName;
+    }
+
+
+    private async void LoadFile(string fileName)
+    {
+        if (_graphEdit == null)
+        {
+            return;
+        }
+
+        var filePath = Path.Join(Config.GetLevelGraphExportDirectory(), FileNameToActualName(fileName));
+        if (!File.Exists(filePath))
+        {
+            //file does not exist
+            //文件不存在。
+            return;
+        }
+
+        var levelGraphEditorSaveData =
+            await JsonSerialization.ReadJsonFileToObj<LevelGraphEditorSaveData>(filePath);
+        if (levelGraphEditorSaveData == null)
+        {
+            //Deserialization failed.
+            //反序列化失败。
+            return;
+        }
+
+        //Do not call DeleteAllChildAsync; this will raise "ERROR: Caller thread can't call this function in this node."
+        //不要调用DeleteAllChildAsync方法，这会引发“ERROR: Caller thread can't call this function in this node”。
+        NodeUtils.DeleteAllChild(_graphEdit);
+        _roomIndex = 1;
+        var roomNodeDataList = levelGraphEditorSaveData.RoomNodeDataList;
+        if (roomNodeDataList != null)
+        {
+            foreach (var roomNodeData in roomNodeDataList)
+            {
+                if (string.IsNullOrEmpty(roomNodeData.Id))
+                {
+                    continue;
+                }
+
+                //Instantiate the room node.
+                //实例化房间节点。
+                var roomNode = CreateRoomNode(roomNodeData);
+                if (roomNode != null)
+                {
+                    roomNode.Name = roomNodeData.Id;
+                }
+            }
+        }
+
+        var connectionDataList = levelGraphEditorSaveData.ConnectionDataList;
+        if (connectionDataList != null)
+        {
+            foreach (var connectionData in connectionDataList)
+            {
+                if (string.IsNullOrEmpty(connectionData.FromId))
+                {
+                    continue;
+                }
+
+                if (string.IsNullOrEmpty(connectionData.ToId))
+                {
+                    continue;
+                }
+
+                //Connecting rooms
+                //连接房间
+                _graphEdit.ConnectNode(connectionData.FromId, connectionData.FromPort, connectionData.ToId,
+                    connectionData.ToPort);
+            }
+        }
+    }
+
     /// <summary>
     /// <para>Get node data by name</para>
     /// <para>根据名称获取节点数据</para>
@@ -363,7 +601,7 @@ public partial class LevelGraphEditorLoader : UiLoaderTemplate
     ///<para>名称</para>
     /// </param>
     /// <returns></returns>
-    private IRoomNodeData? GetRoomNodeData(string name)
+    private RoomNodeData? GetRoomNodeData(string name)
     {
         if (_graphEdit == null)
         {