Index: Core/Common/src/Core.Common.Gui/Forms/ViewHost/AvalonDockViewHost.xaml
===================================================================
diff -u -r67284323e2785c651633d9c52049ba12a9c70e6a -r311e009ea32c0aac809f03cab8aed58307a228f7
--- Core/Common/src/Core.Common.Gui/Forms/ViewHost/AvalonDockViewHost.xaml	(.../AvalonDockViewHost.xaml)	(revision 67284323e2785c651633d9c52049ba12a9c70e6a)
+++ Core/Common/src/Core.Common.Gui/Forms/ViewHost/AvalonDockViewHost.xaml	(.../AvalonDockViewHost.xaml)	(revision 311e009ea32c0aac809f03cab8aed58307a228f7)
@@ -51,7 +51,7 @@
             </xcad:DockingManager.AnchorableHeaderTemplate>
             <xcad:LayoutRoot>
                 <xcad:LayoutPanel Orientation="Horizontal" x:Name="LeftRightLayoutTarget">
-                    <xcad:LayoutAnchorablePaneGroup x:Name="LeftLayoutAnchorablePaneGroup" Orientation="Vertical" DockWidth="260">
+                    <xcad:LayoutAnchorablePaneGroup x:Name="LeftLayoutAnchorablePaneGroup" Orientation="Vertical" DockWidth="400">
                         <xcad:LayoutAnchorablePane />
                     </xcad:LayoutAnchorablePaneGroup>
                     <xcad:LayoutPanel Orientation="Vertical" x:Name="BottomLayoutTarget">
@@ -72,7 +72,7 @@
                             <xcad:LayoutAnchorable x:Name="DummyPanelB"/> <!-- Don't remove: dummy panel in order to prevent garbage collection by AvalonDock -->
                         </xcad:LayoutAnchorablePane>
                     </xcad:LayoutAnchorablePaneGroup>
-                    <xcad:LayoutAnchorablePaneGroup x:Name="RightLayoutAnchorablePaneGroup" Orientation="Vertical" DockWidth="220">
+                    <xcad:LayoutAnchorablePaneGroup x:Name="RightLayoutAnchorablePaneGroup" Orientation="Vertical" DockWidth="400">
                         <xcad:LayoutAnchorablePane />
                     </xcad:LayoutAnchorablePaneGroup>
                 </xcad:LayoutPanel>