Index: Core/Gui/src/Core.Gui/Forms/ViewHost/AvalonDockViewHost.xaml.cs
===================================================================
diff -u -rde445c282156e5a7af9309daf9e23676c44a6b47 -rda060e2fbb88d443f8322e761ef7db109194d37e
--- Core/Gui/src/Core.Gui/Forms/ViewHost/AvalonDockViewHost.xaml.cs	(.../AvalonDockViewHost.xaml.cs)	(revision de445c282156e5a7af9309daf9e23676c44a6b47)
+++ Core/Gui/src/Core.Gui/Forms/ViewHost/AvalonDockViewHost.xaml.cs	(.../AvalonDockViewHost.xaml.cs)	(revision da060e2fbb88d443f8322e761ef7db109194d37e)
@@ -104,7 +104,7 @@
             }
         }
 
-        public void AddDocumentView(IView view, string title)
+        public void AddDocumentView(IView view, string title, string symbol)
         {
             var control = view as Control;
             if (control == null)
@@ -126,7 +126,8 @@
             var layoutDocument = new CustomLayoutDocument
             {
                 Title = title,
-                Content = hostControl
+                Content = hostControl,
+                Symbol = symbol
             };
 
             PerformWithoutChangingActiveContent(() => AddLayoutDocument(layoutDocument));
Index: Core/Gui/src/Core.Gui/Forms/ViewHost/DocumentViewController.cs
===================================================================
diff -u -r52afae9d58221d7dbff28a2d7ffbae78d4cd325c -rda060e2fbb88d443f8322e761ef7db109194d37e
--- Core/Gui/src/Core.Gui/Forms/ViewHost/DocumentViewController.cs	(.../DocumentViewController.cs)	(revision 52afae9d58221d7dbff28a2d7ffbae78d4cd325c)
+++ Core/Gui/src/Core.Gui/Forms/ViewHost/DocumentViewController.cs	(.../DocumentViewController.cs)	(revision da060e2fbb88d443f8322e761ef7db109194d37e)
@@ -173,7 +173,7 @@
 
             openedViewLookup.Add(data, view);
 
-            viewHost.AddDocumentView(view.Item1, viewInfo.GetViewName(view.Item1, data));
+            viewHost.AddDocumentView(view.Item1, viewInfo.GetViewName(view.Item1, data), "\uE900");
             viewHost.SetImage(view.Item1, viewInfo.Image);
         }
 
Index: Core/Gui/src/Core.Gui/Forms/ViewHost/IViewHost.cs
===================================================================
diff -u -r657a26806c182f66f35f045b6714f37586936d92 -rda060e2fbb88d443f8322e761ef7db109194d37e
--- Core/Gui/src/Core.Gui/Forms/ViewHost/IViewHost.cs	(.../IViewHost.cs)	(revision 657a26806c182f66f35f045b6714f37586936d92)
+++ Core/Gui/src/Core.Gui/Forms/ViewHost/IViewHost.cs	(.../IViewHost.cs)	(revision da060e2fbb88d443f8322e761ef7db109194d37e)
@@ -81,8 +81,9 @@
         /// </summary>
         /// <param name="view">The document view to add.</param>
         /// <param name="title">The title to show.</param>
+        /// <param name="symbol">The symbol to show.</param>
         /// <seealso cref="ActiveDocumentView"/>
-        void AddDocumentView(IView view, string title);
+        void AddDocumentView(IView view, string title, string symbol);
 
         /// <summary>
         /// Adds a tool view.
Index: Core/Gui/test/Core.Gui.Test/Forms/Main/MainWindowTest.cs
===================================================================
diff -u -r1bd607557c5bb0a20ae42af745bc9a402d020e79 -rda060e2fbb88d443f8322e761ef7db109194d37e
--- Core/Gui/test/Core.Gui.Test/Forms/Main/MainWindowTest.cs	(.../MainWindowTest.cs)	(revision 1bd607557c5bb0a20ae42af745bc9a402d020e79)
+++ Core/Gui/test/Core.Gui.Test/Forms/Main/MainWindowTest.cs	(.../MainWindowTest.cs)	(revision da060e2fbb88d443f8322e761ef7db109194d37e)
@@ -656,7 +656,7 @@
                 Assert.IsNull(GetMapControl(mapLegendView));
 
                 // When
-                gui.ViewHost.AddDocumentView(view, string.Empty);
+                gui.ViewHost.AddDocumentView(view, string.Empty, string.Empty);
 
                 // Then
                 Assert.AreSame(view.Map, GetMapControl(mapLegendView));
@@ -687,8 +687,8 @@
                 var view2 = new TestMapView();
                 MapLegendView mapLegendView = mainWindow.MapLegendView;
 
-                gui.ViewHost.AddDocumentView(view1, string.Empty);
-                gui.ViewHost.AddDocumentView(view2, string.Empty);
+                gui.ViewHost.AddDocumentView(view1, string.Empty, string.Empty);
+                gui.ViewHost.AddDocumentView(view2, string.Empty, string.Empty);
 
                 // Precondition
                 Assert.AreSame(view2.Map, GetMapControl(mapLegendView));
@@ -724,7 +724,7 @@
                 var view = new TestMapView();
                 MapLegendView mapLegendView = mainWindow.MapLegendView;
 
-                gui.ViewHost.AddDocumentView(view, string.Empty);
+                gui.ViewHost.AddDocumentView(view, string.Empty, string.Empty);
 
                 // Precondition
                 Assert.AreSame(view.Map, GetMapControl(mapLegendView));
@@ -761,8 +761,8 @@
                 var view2 = new TestMapView();
                 MapLegendView mapLegendView = mainWindow.MapLegendView;
 
-                gui.ViewHost.AddDocumentView(view1, string.Empty);
-                gui.ViewHost.AddDocumentView(view2, string.Empty);
+                gui.ViewHost.AddDocumentView(view1, string.Empty, string.Empty);
+                gui.ViewHost.AddDocumentView(view2, string.Empty, string.Empty);
 
                 // Precondition
                 Assert.AreSame(view2.Map, GetMapControl(mapLegendView));
@@ -802,7 +802,7 @@
                 Assert.IsNull(GetChartControl(chartLegendView));
 
                 // When
-                gui.ViewHost.AddDocumentView(view, string.Empty);
+                gui.ViewHost.AddDocumentView(view, string.Empty, string.Empty);
 
                 // Then
                 Assert.AreSame(view.Chart, GetChartControl(chartLegendView));
@@ -833,8 +833,8 @@
                 var view2 = new TestChartView();
                 ChartLegendView chartLegendView = mainWindow.ChartLegendView;
 
-                gui.ViewHost.AddDocumentView(view1, string.Empty);
-                gui.ViewHost.AddDocumentView(view2, string.Empty);
+                gui.ViewHost.AddDocumentView(view1, string.Empty, string.Empty);
+                gui.ViewHost.AddDocumentView(view2, string.Empty, string.Empty);
 
                 // Precondition
                 Assert.AreSame(view2.Chart, GetChartControl(chartLegendView));
@@ -870,7 +870,7 @@
                 var view = new TestChartView();
                 ChartLegendView chartLegendView = mainWindow.ChartLegendView;
 
-                gui.ViewHost.AddDocumentView(view, string.Empty);
+                gui.ViewHost.AddDocumentView(view, string.Empty, string.Empty);
 
                 // Precondition
                 Assert.AreSame(view.Chart, GetChartControl(chartLegendView));
@@ -907,8 +907,8 @@
                 var view2 = new TestChartView();
                 ChartLegendView chartLegendView = mainWindow.ChartLegendView;
 
-                gui.ViewHost.AddDocumentView(view1, string.Empty);
-                gui.ViewHost.AddDocumentView(view2, string.Empty);
+                gui.ViewHost.AddDocumentView(view1, string.Empty, string.Empty);
+                gui.ViewHost.AddDocumentView(view2, string.Empty, string.Empty);
 
                 // Precondition
                 Assert.AreSame(view2.Chart, GetChartControl(chartLegendView));
@@ -1332,7 +1332,7 @@
 
                 mainWindow.SetGui(gui);
 
-                gui.ViewHost.AddDocumentView(new TestView(), string.Empty);
+                gui.ViewHost.AddDocumentView(new TestView(), string.Empty, string.Empty);
 
                 // When
                 bool canExecute = mainWindow.CloseViewTabCommand.CanExecute(null);
@@ -1456,13 +1456,13 @@
         {
             return TypeUtils.GetProperty<IChartControl>(chartLegendView, "ChartControl");
         }
-        
+
         private static void AssertViewTitle(DockingManager dockingManager, IView view, string expectedTitle)
         {
-            LayoutContent layoutContent =  dockingManager.Layout.Descendents()
-                                                         .OfType<LayoutContent>()
-                                                         .First(d => ((WindowsFormsHost) d.Content).Child == view);
-            
+            LayoutContent layoutContent = dockingManager.Layout.Descendents()
+                                                        .OfType<LayoutContent>()
+                                                        .First(d => ((WindowsFormsHost) d.Content).Child == view);
+
             Assert.AreEqual(expectedTitle, layoutContent.Title);
         }
     }
Index: Core/Gui/test/Core.Gui.Test/GuiCoreTest.cs
===================================================================
diff -u -rbbb6068d01161dfc28efeb537d9c4ff324c373b8 -rda060e2fbb88d443f8322e761ef7db109194d37e
--- Core/Gui/test/Core.Gui.Test/GuiCoreTest.cs	(.../GuiCoreTest.cs)	(revision bbb6068d01161dfc28efeb537d9c4ff324c373b8)
+++ Core/Gui/test/Core.Gui.Test/GuiCoreTest.cs	(.../GuiCoreTest.cs)	(revision da060e2fbb88d443f8322e761ef7db109194d37e)
@@ -421,7 +421,7 @@
                 var gui = new GuiCore(new MainWindow(), projectStore, projectMigrator, projectFactory, new GuiCoreSettings());
                 gui.Run();
 
-                gui.ViewHost.AddDocumentView(documentView, string.Empty);
+                gui.ViewHost.AddDocumentView(documentView, string.Empty, string.Empty);
 
                 // Call
                 gui.Dispose();
@@ -1282,7 +1282,7 @@
             using (var gui = new GuiCore(new MainWindow(), projectStore, projectMigrator, projectFactory, new GuiCoreSettings()))
             {
                 gui.Run();
-                gui.ViewHost.AddDocumentView(selectionProvider, string.Empty);
+                gui.ViewHost.AddDocumentView(selectionProvider, string.Empty, string.Empty);
 
                 // Precondition
                 Assert.IsNull(gui.Selection);
@@ -1312,7 +1312,7 @@
             using (var gui = new GuiCore(new MainWindow(), projectStore, projectMigrator, projectFactory, new GuiCoreSettings()))
             {
                 gui.Run();
-                gui.ViewHost.AddDocumentView(selectionProvider, string.Empty);
+                gui.ViewHost.AddDocumentView(selectionProvider, string.Empty, string.Empty);
 
                 gui.Selection = new object();
 
@@ -1341,7 +1341,7 @@
             using (var gui = new GuiCore(new MainWindow(), projectStore, projectMigrator, projectFactory, new GuiCoreSettings()))
             {
                 gui.Run();
-                gui.ViewHost.AddDocumentView(selectionProvider, string.Empty);
+                gui.ViewHost.AddDocumentView(selectionProvider, string.Empty, string.Empty);
                 SetActiveView((AvalonDockViewHost) gui.ViewHost, selectionProvider);
 
                 gui.Selection = new object();
@@ -1372,7 +1372,7 @@
             using (var gui = new GuiCore(new MainWindow(), projectStore, projectMigrator, projectFactory, new GuiCoreSettings()))
             {
                 gui.Run();
-                gui.ViewHost.AddDocumentView(selectionProvider, string.Empty);
+                gui.ViewHost.AddDocumentView(selectionProvider, string.Empty, string.Empty);
                 SetActiveView((AvalonDockViewHost) gui.ViewHost, selectionProvider);
 
                 gui.ViewHost.Remove(selectionProvider);
@@ -1405,7 +1405,7 @@
             using (var gui = new GuiCore(new MainWindow(), projectStore, projectMigrator, projectFactory, new GuiCoreSettings()))
             {
                 gui.Run();
-                gui.ViewHost.AddDocumentView(testView, string.Empty);
+                gui.ViewHost.AddDocumentView(testView, string.Empty, string.Empty);
 
                 gui.Selection = selection;
 
@@ -1435,7 +1435,7 @@
             using (var gui = new GuiCore(new MainWindow(), projectStore, projectMigrator, projectFactory, new GuiCoreSettings()))
             {
                 gui.Run();
-                gui.ViewHost.AddDocumentView(testView, string.Empty);
+                gui.ViewHost.AddDocumentView(testView, string.Empty, string.Empty);
 
                 gui.Selection = selection;
 
@@ -1464,7 +1464,7 @@
             using (var gui = new GuiCore(new MainWindow(), projectStore, projectMigrator, projectFactory, new GuiCoreSettings()))
             {
                 gui.Run();
-                gui.ViewHost.AddDocumentView(selectionProvider, string.Empty);
+                gui.ViewHost.AddDocumentView(selectionProvider, string.Empty, string.Empty);
                 SetActiveView((AvalonDockViewHost) gui.ViewHost, selectionProvider);
 
                 // Precondition
@@ -1494,7 +1494,7 @@
 
             var gui = new GuiCore(new MainWindow(), projectStore, projectMigrator, projectFactory, new GuiCoreSettings());
             gui.Run();
-            gui.ViewHost.AddDocumentView(selectionProvider, string.Empty);
+            gui.ViewHost.AddDocumentView(selectionProvider, string.Empty, string.Empty);
             SetActiveView((AvalonDockViewHost) gui.ViewHost, selectionProvider);
 
             gui.Dispose();