diff --git a/ILSpy/Docking/DockingHelper.cs b/ILSpy/Docking/DockingHelper.cs
index 449d703b6..157837a6c 100644
--- a/ILSpy/Docking/DockingHelper.cs
+++ b/ILSpy/Docking/DockingHelper.cs
@@ -18,9 +18,14 @@ namespace ICSharpCode.ILSpy.Docking
 				}
 				parentDocumentGroup.Orientation = System.Windows.Controls.Orientation.Vertical;
 				int indexOfParentPane = parentDocumentGroup.IndexOfChild(parentDocumentPane);
-				parentDocumentGroup.InsertChildAt(dockBefore ? indexOfParentPane : indexOfParentPane + 1, new LayoutDocumentPane(layoutContent) { DockHeight = dockHeight });
+				var layoutDocumentPane = new LayoutDocumentPane(layoutContent) { DockHeight = dockHeight };
+				parentDocumentGroup.InsertChildAt(dockBefore ? indexOfParentPane : indexOfParentPane + 1, layoutDocumentPane);
 				layoutContent.IsActive = true;
 				layoutContent.Root.CollectGarbage();
+				Application.Current.MainWindow.Dispatcher.Invoke(() => {
+
+					layoutDocumentPane.DockHeight = dockHeight;
+				}, System.Windows.Threading.DispatcherPriority.Loaded);
 			}
 		}
 	}
diff --git a/ILSpy/MainWindow.xaml b/ILSpy/MainWindow.xaml
index c99cbd82b..faff33607 100644
--- a/ILSpy/MainWindow.xaml
+++ b/ILSpy/MainWindow.xaml
@@ -126,7 +126,7 @@
 					<avalondock:LayoutPanel Orientation="Horizontal">
 						<avalondock:LayoutAnchorablePaneGroup DockWidth="200" Orientation="Vertical">
 							<avalondock:LayoutAnchorablePane DockHeight="*">
-								<avalondock:LayoutAnchorable x:Name="Tree" Title="Project Explorer" CanClose="False">
+								<avalondock:LayoutAnchorable x:Name="Tree" Title="Project Explorer" CanHide="False" CanClose="False">
 									<!-- Left pane: Tree View of assemblies and classes -->
 									<tv:SharpTreeView
 										Name="treeView"
@@ -142,7 +142,7 @@
 
 						<avalondock:LayoutDocumentPaneGroup DockWidth="*">
 							<avalondock:LayoutDocumentPane x:Name="adDocumentPane">
-								<avalondock:LayoutDocument Title="Decompilation">
+								<avalondock:LayoutDocument Title="MAIN" CanClose="False">
 									<!-- decompilerTextView is into the mainPane by code -->
 									<ContentPresenter Name="mainPane" />
 								</avalondock:LayoutDocument>
diff --git a/ILSpy/MainWindow.xaml.cs b/ILSpy/MainWindow.xaml.cs
index a27d07558..772d3bd62 100644
--- a/ILSpy/MainWindow.xaml.cs
+++ b/ILSpy/MainWindow.xaml.cs
@@ -1054,13 +1054,13 @@ namespace ICSharpCode.ILSpy
 		public void ShowInNewPane(string title, object content, PanePosition panePosition, string toolTip = null)
 		{
 			if (panePosition == PanePosition.Document) {
-				var layoutDocument = new LayoutDocument() { Title = title, Content = content, ToolTip = toolTip };
+				var layoutDocument = new LayoutDocument() { Title = title, Content = content, ToolTip = toolTip, CanClose = true };
 			var documentPane = this.DockManager.Layout.Descendents().OfType<LayoutDocumentPane>().FirstOrDefault();
 				documentPane.Children.Add(layoutDocument);
 			} else {
-				var layoutAnchorable = new LayoutAnchorable() { Title = title, Content = content, ToolTip = toolTip };
+				var layoutAnchorable = new LayoutAnchorable() { Title = title, Content = content, ToolTip = toolTip, CanClose = true, CanHide = true };
 				var documentPane = this.DockManager.Layout.Descendents().OfType<LayoutDocumentPane>().FirstOrDefault();
-			Docking.DockingHelper.DockHorizontal(layoutAnchorable, documentPane, new GridLength(100), panePosition == PanePosition.Top);
+				Docking.DockingHelper.DockHorizontal(layoutAnchorable, documentPane, new GridLength(200), panePosition == PanePosition.Top);
 		}
 		}