diff --git a/DunGenPlus/DunGenPlus/DevTools/DevDebugManager.cs b/DunGenPlus/DunGenPlus/DevTools/DevDebugManager.cs
index 859ad9b..8391995 100644
--- a/DunGenPlus/DunGenPlus/DevTools/DevDebugManager.cs
+++ b/DunGenPlus/DunGenPlus/DevTools/DevDebugManager.cs
@@ -25,6 +25,7 @@ namespace DunGenPlus.DevTools {
     public RuntimeDungeon dungeon;
     public GameObject devCamera;
     public BasePanel[] panels;
+    public RectTransform canvasRectTransform;
 
     public TMP_Dropdown dungeonFlowSelectionDropDown;
     private ExtendedDungeonFlow[] dungeonFlows;
@@ -49,6 +50,10 @@ namespace DunGenPlus.DevTools {
 
     private Vector2 cameraYRange;
 
+    // canvas
+    public bool canvasExtended;
+    private float canvasWidthTarget;
+
     void Awake(){
       Instance = this;
 
@@ -70,6 +75,9 @@ namespace DunGenPlus.DevTools {
       disabledGameObject.transform.SetParent(transform);
 
       cameraYRange = new Vector2(devCamera.transform.position.y - 200f, devCamera.transform.position.y);
+
+      canvasExtended = false;
+      canvasWidthTarget = 440f;
     }
 
     void OnDestroy(){
@@ -85,6 +93,10 @@ namespace DunGenPlus.DevTools {
     }
 
     void Update(){
+      var sizeDelta = canvasRectTransform.sizeDelta;
+      sizeDelta.x = Mathf.Lerp(sizeDelta.x, canvasWidthTarget, Time.deltaTime * 10f);
+      canvasRectTransform.sizeDelta = sizeDelta;
+
       statusTextMesh.text = dungeon.Generator.Status.ToString();
 
       if (!DevDebugOpen.IsSinglePlayerInShip()) {
@@ -111,6 +123,11 @@ namespace DunGenPlus.DevTools {
       }
     }
 
+    public void ToggleCanvasExtended(){
+      canvasExtended = !canvasExtended;
+      canvasWidthTarget = canvasExtended ? 800f : 440f;
+    }
+
     public void SelectDungeonFlow(int index){
       selectedExtendedDungeonFlow = dungeonFlows[index];
       selectedDungeonFlow = selectedExtendedDungeonFlow.DungeonFlow;
diff --git a/DunGenPlus/DunGenPlus/DevTools/UIElements/BaseUIElement.cs b/DunGenPlus/DunGenPlus/DevTools/UIElements/BaseUIElement.cs
index 0c694ad..49df7ff 100644
--- a/DunGenPlus/DunGenPlus/DevTools/UIElements/BaseUIElement.cs
+++ b/DunGenPlus/DunGenPlus/DevTools/UIElements/BaseUIElement.cs
@@ -17,6 +17,7 @@ namespace DunGenPlus.DevTools.UIElements {
 
     public LayoutElement layoutElement;
     internal float layoutOffset;
+    internal float layoutWidthBase;
 
     public void SetupBase(TitleParameter titleParameter) {
       title = titleParameter.text;
@@ -26,8 +27,17 @@ namespace DunGenPlus.DevTools.UIElements {
       layoutOffset = titleParameter.offset;
       if (layoutElement) {
         layoutElement.minWidth -= layoutOffset;
+        layoutWidthBase = layoutElement.minWidth;
+      }  
+    }
+
+    void Update(){
+      if (layoutElement) {
+        var minWidth = layoutWidthBase;
+        if (DevDebugManager.Instance.canvasExtended) minWidth += 40f;
+
+        layoutElement.minWidth = Mathf.Lerp(layoutElement.minWidth, minWidth, Time.deltaTime * 10f);
       }
-      
     }
 
     public void SetText(string value) {
diff --git a/DunGenPlus/DunGenPlus/DunGenPlus/DunGenPlus.dll b/DunGenPlus/DunGenPlus/DunGenPlus/DunGenPlus.dll
index 62feb9b..75d4778 100644
Binary files a/DunGenPlus/DunGenPlus/DunGenPlus/DunGenPlus.dll and b/DunGenPlus/DunGenPlus/DunGenPlus/DunGenPlus.dll differ
diff --git a/DunGenPlus/DunGenPlus/dungen b/DunGenPlus/DunGenPlus/dungen
index cc29b18..a0a7388 100644
Binary files a/DunGenPlus/DunGenPlus/dungen and b/DunGenPlus/DunGenPlus/dungen differ