diff --git a/Source/Engine/UI/GUI/Panels/HorizontalPanel.cs b/Source/Engine/UI/GUI/Panels/HorizontalPanel.cs
index da6e747b3..fa322f641 100644
--- a/Source/Engine/UI/GUI/Panels/HorizontalPanel.cs
+++ b/Source/Engine/UI/GUI/Panels/HorizontalPanel.cs
@@ -74,7 +74,7 @@ namespace FlaxEngine.GUI
                     }
                     maxHeight = Mathf.Max(maxHeight, ch);
 
-                    if (ExpandChildSize)
+                    if (ExpandChildSize && !AutoSize)
                     {
                         c.Width = itemWidth;
                     }
diff --git a/Source/Engine/UI/GUI/Panels/PanelWithMargins.cs b/Source/Engine/UI/GUI/Panels/PanelWithMargins.cs
index 773415d64..eb2706e88 100644
--- a/Source/Engine/UI/GUI/Panels/PanelWithMargins.cs
+++ b/Source/Engine/UI/GUI/Panels/PanelWithMargins.cs
@@ -177,7 +177,7 @@ namespace FlaxEngine.GUI
         /// <summary>
         /// If checked, the panel will expand all children in the relevant direction with even spacing and size (horizontally for Horizontal Panel, vertically for Vertical Panel).
         /// </summary>
-        [EditorOrder(36), DefaultValue(false)]
+        [EditorOrder(36), DefaultValue(false), VisibleIf(nameof(AutoSize), true)]
         public bool ExpandChildSize
         {
             get => _expandChildSize;
diff --git a/Source/Engine/UI/GUI/Panels/VerticalPanel.cs b/Source/Engine/UI/GUI/Panels/VerticalPanel.cs
index d54e6c203..00b849529 100644
--- a/Source/Engine/UI/GUI/Panels/VerticalPanel.cs
+++ b/Source/Engine/UI/GUI/Panels/VerticalPanel.cs
@@ -74,7 +74,7 @@ namespace FlaxEngine.GUI
                     }
                     maxWidth = Mathf.Max(maxWidth, cw);
 
-                    if (ExpandChildSize)
+                    if (ExpandChildSize && !AutoSize)
                     {
                         c.Height = itemHeight;
                     }