diff --git a/Filtration/Filtration.csproj b/Filtration/Filtration.csproj
index a40576d..ac68abf 100644
--- a/Filtration/Filtration.csproj
+++ b/Filtration/Filtration.csproj
@@ -102,6 +102,9 @@
     <Reference Include="Xceed.Wpf.AvalonDock.Themes.VS2010">
       <HintPath>..\packages\AvalonDock.2.0.2000\lib\net40\Xceed.Wpf.AvalonDock.Themes.VS2010.dll</HintPath>
     </Reference>
+    <Reference Include="Xceed.Wpf.AvalonDock.Themes.VS2013">
+      <HintPath>.\Xceed.Wpf.AvalonDock.Themes.VS2013.dll</HintPath>
+    </Reference>
     <Reference Include="Xceed.Wpf.Toolkit, Version=2.4.0.0, Culture=neutral, PublicKeyToken=3e4669d2f30244f4, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\packages\Extended.Wpf.Toolkit.2.4\lib\net40\Xceed.Wpf.Toolkit.dll</HintPath>
diff --git a/Filtration/Repositories/ItemFilterScriptRepository.cs b/Filtration/Repositories/ItemFilterScriptRepository.cs
index 9aceccc..2a2af93 100644
--- a/Filtration/Repositories/ItemFilterScriptRepository.cs
+++ b/Filtration/Repositories/ItemFilterScriptRepository.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Collections.Generic;
 using System.IO;
 using Filtration.Models;
 using Filtration.Services;
diff --git a/Filtration/ViewModels/ItemFilterBlockViewModel.cs b/Filtration/ViewModels/ItemFilterBlockViewModel.cs
index 41bd4e2..8746c37 100644
--- a/Filtration/ViewModels/ItemFilterBlockViewModel.cs
+++ b/Filtration/ViewModels/ItemFilterBlockViewModel.cs
@@ -91,7 +91,7 @@ namespace Filtration.ViewModels
         public ItemFilterBlock Block { get; private set; }
         public bool IsDirty { get; set; }
 
-        public ObservableCollection<IItemFilterBlockItem> FilterBlockItems
+        public ObservableCollection<IItemFilterBlockItem> BlockItems
         {
             get { return Block.BlockItems; }
         }
@@ -226,7 +226,7 @@ namespace Filtration.ViewModels
             get
             {
                 return HasTextColor
-                    ? FilterBlockItems.OfType<TextColorBlockItem>().First().Color
+                    ? BlockItems.OfType<TextColorBlockItem>().First().Color
                     : new Color { A = 255, R = 255, G = 255, B = 255 };
             }
         }
@@ -241,7 +241,7 @@ namespace Filtration.ViewModels
             get
             {
                 return HasBackgroundColor
-                    ? FilterBlockItems.OfType<BackgroundColorBlockItem>().First().Color
+                    ? BlockItems.OfType<BackgroundColorBlockItem>().First().Color
                     : new Color { A = 255, R = 0, G = 0, B = 0 };
             }
         }
@@ -256,7 +256,7 @@ namespace Filtration.ViewModels
             get
             {
                 return HasBorderColor
-                    ? FilterBlockItems.OfType<BorderColorBlockItem>().First().Color
+                    ? BlockItems.OfType<BorderColorBlockItem>().First().Color
                     : new Color { A = 255, R = 0, G = 0, B = 0 };
             }
         }
@@ -285,13 +285,13 @@ namespace Filtration.ViewModels
             if (!AddBlockItemAllowed(blockItemType)) return;
             var newBlockItem = (IItemFilterBlockItem) Activator.CreateInstance(blockItemType);
         
-            FilterBlockItems.Add(newBlockItem);
+            BlockItems.Add(newBlockItem);
             IsDirty = true;
         }
 
         private void OnRemoveFilterBlockItemCommand(IItemFilterBlockItem blockItem)
         {
-            FilterBlockItems.Remove(blockItem);
+            BlockItems.Remove(blockItem);
             IsDirty = true;
         }
 
@@ -301,7 +301,7 @@ namespace Filtration.ViewModels
             var newBlockItem = (IItemFilterBlockItem) Activator.CreateInstance(blockItemType);
 
             newBlockItem.PropertyChanged += OnAudioVisualBlockItemChanged;
-            FilterBlockItems.Add(newBlockItem);
+            BlockItems.Add(newBlockItem);
             OnAudioVisualBlockItemChanged(null, null);
             IsDirty = true;
         }
@@ -309,7 +309,7 @@ namespace Filtration.ViewModels
         private void OnRemoveAudioVisualBlockItemCommand(IItemFilterBlockItem blockItem)
         {
             blockItem.PropertyChanged -= OnAudioVisualBlockItemChanged;
-            FilterBlockItems.Remove(blockItem);
+            BlockItems.Remove(blockItem);
             OnAudioVisualBlockItemChanged(null, null);
             IsDirty = true;
         }
@@ -370,13 +370,13 @@ namespace Filtration.ViewModels
         private bool AddBlockItemAllowed(Type type)
         {
             var blockItem = (IItemFilterBlockItem)Activator.CreateInstance(type);
-            var blockCount = FilterBlockItems.Count(b => b.GetType() == type);
+            var blockCount = BlockItems.Count(b => b.GetType() == type);
             return blockCount < blockItem.MaximumAllowed;
         }
 
         private void OnPlaySoundCommand()
         {
-            var soundUri = "Resources/AlertSounds/AlertSound" + FilterBlockItems.OfType<SoundBlockItem>().First().Value + ".wav";
+            var soundUri = "Resources/AlertSounds/AlertSound" + BlockItems.OfType<SoundBlockItem>().First().Value + ".wav";
             _mediaPlayer.Open(new Uri(soundUri, UriKind.Relative));
             _mediaPlayer.Play();
         }
diff --git a/Filtration/Views/AvalonDock/AvalonDockWorkspaceView.xaml b/Filtration/Views/AvalonDock/AvalonDockWorkspaceView.xaml
index 24f9ab9..104214a 100644
--- a/Filtration/Views/AvalonDock/AvalonDockWorkspaceView.xaml
+++ b/Filtration/Views/AvalonDock/AvalonDockWorkspaceView.xaml
@@ -71,14 +71,18 @@
                     </viewsAvalonDock:PanesStyleSelector.DocumentStyle>
                 </viewsAvalonDock:PanesStyleSelector>
             </xcad:DockingManager.LayoutItemContainerStyleSelector>
+            
             <xcad:DockingManager.LayoutUpdateStrategy>
-                <viewsAvalonDock:LayoutInitializer></viewsAvalonDock:LayoutInitializer>
+                <viewsAvalonDock:LayoutInitializer />
             </xcad:DockingManager.LayoutUpdateStrategy>
 
             <xcad:LayoutRoot>
                 <xcad:LayoutPanel Orientation="Horizontal">
                     <xcad:LayoutAnchorablePane Name="SectionBrowserPane" DockWidth="150" />
-                    <xcad:LayoutDocumentPane/>
+                    <xcad:LayoutPanel Orientation="Vertical">
+                        <xcad:LayoutDocumentPane />
+                        <xcad:LayoutAnchorablePane Name="BlockOutputPreviewPane" DockHeight="100" />
+                    </xcad:LayoutPanel>
                     <xcad:LayoutAnchorablePane Name="BlockGroupBrowserPane" DockWidth="200" />
                 </xcad:LayoutPanel>
             </xcad:LayoutRoot>
diff --git a/Filtration/Views/AvalonDock/LayoutInitializer.cs b/Filtration/Views/AvalonDock/LayoutInitializer.cs
index 9d36602..2a1b836 100644
--- a/Filtration/Views/AvalonDock/LayoutInitializer.cs
+++ b/Filtration/Views/AvalonDock/LayoutInitializer.cs
@@ -26,32 +26,19 @@ namespace Filtration.Views.AvalonDock
                     return true;
                 }
             }
-            //if (anchorableToShow.ContentId == "SectionBrowserTool")
-            //{
-            //    var toolsPane = layout.Descendents().OfType<LayoutAnchorablePane>().FirstOrDefault(d => d.Name == "SectionBrowserPane");
-            //    if (toolsPane != null)
-            //    {
-            //        anchorableToShow.CanHide = false;
-            //        toolsPane.Children.Add(anchorableToShow);
-            //        return true;
-            //    }
-            //}
-
-            //if (anchorableToShow.ContentId == "BlockGroupBrowserTool")
-            //{
-            //    var toolsPane = layout.Descendents().OfType<LayoutAnchorablePane>().FirstOrDefault(d => d.Name == "BlockGroupBrowserPane");
-            //    if (toolsPane != null)
-            //    {
-            //        anchorableToShow.CanHide = false;
-            //        toolsPane.Children.Add(anchorableToShow);
-            //        return true;
-            //    }
-            //}
-
 
+            if (anchorableToShow.Content is BlockGroupBrowserViewModel)
+            {
+                var toolsPane = layout.Descendents().OfType<LayoutAnchorablePane>().FirstOrDefault(d => d.Name == "BlockGroupBrowserPane");
+                if (toolsPane != null)
+                {
+                    anchorableToShow.CanHide = false;
+                    toolsPane.Children.Add(anchorableToShow);
+                    return true;
+                }
+            }
 
             return false;
-
         }
 
 
diff --git a/Filtration/Views/ItemFilterBlockView.xaml b/Filtration/Views/ItemFilterBlockView.xaml
index d0f2560..3aee75a 100644
--- a/Filtration/Views/ItemFilterBlockView.xaml
+++ b/Filtration/Views/ItemFilterBlockView.xaml
@@ -38,7 +38,7 @@
                         <ToolTip Visibility="{Binding AdvancedBlockGroup, Converter={StaticResource BooleanVisibilityConverter}}">Advanced Block Group</ToolTip>
                     </Rectangle.ToolTip>
                 </Rectangle>
-                <Expander Grid.Column="1" Style="{StaticResource ExpanderRightAlignStyle}" x:Name="TestExpander" ToolTip="{Binding BlockDescription}" ToolTipService.IsEnabled="{Binding RelativeSource={RelativeSource Mode=Self}, Path=IsExpanded, Converter={StaticResource BoolInverterConverter}}">
+                <Expander Grid.Column="1" Style="{StaticResource ExpanderRightAlignStyle}" x:Name="BlockExpander" MouseDoubleClick="BlockExpander_OnMouseDoubleClick" ToolTip="{Binding BlockDescription}" ToolTipService.IsEnabled="{Binding RelativeSource={RelativeSource Mode=Self}, Path=IsExpanded, Converter={StaticResource BoolInverterConverter}}">
                     <Expander.ContextMenu>
                         <ContextMenu>
                             <ContextMenu.Items>
@@ -121,7 +121,7 @@
                             </Popup>
                         </Grid>
                     </Expander.Header>
-                    <Grid Margin="10,5,10,5">
+                    <Grid Margin="10,5,10,5" x:Name="BlockItemsGrid">
                         <Grid.RowDefinitions>
                             <RowDefinition />
                             <RowDefinition />
@@ -148,7 +148,7 @@
                         
                         <!-- Block Items -->
                         <WrapPanel Grid.Row="1" MaxHeight="200">
-                            <ItemsControl ItemsSource="{Binding FilterBlockItems}">
+                            <ItemsControl ItemsSource="{Binding BlockItems}">
                                 <ItemsControl.ItemsPanel>
                                     <ItemsPanelTemplate>
                                         <WrapPanel Orientation="Vertical" />
diff --git a/Filtration/Views/ItemFilterBlockView.xaml.cs b/Filtration/Views/ItemFilterBlockView.xaml.cs
index 8fbad01..5631e4b 100644
--- a/Filtration/Views/ItemFilterBlockView.xaml.cs
+++ b/Filtration/Views/ItemFilterBlockView.xaml.cs
@@ -1,4 +1,7 @@
-namespace Filtration.Views
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace Filtration.Views
 {
     public partial class ItemFilterBlockView
     {
@@ -6,5 +9,16 @@
         {
             InitializeComponent();
         }
+
+        private void BlockExpander_OnMouseDoubleClick(object sender, MouseButtonEventArgs e)
+        {
+            var originalSource = e.OriginalSource as System.Windows.Media.Visual;
+            if (originalSource != null && originalSource.IsDescendantOf(BlockItemsGrid))
+            {
+                return;
+            }
+            
+            BlockExpander.IsExpanded = !BlockExpander.IsExpanded;
+        }
     }
 }
diff --git a/Filtration/Views/ToolPanes/SectionBrowserView.xaml.cs b/Filtration/Views/ToolPanes/SectionBrowserView.xaml.cs
new file mode 100644
index 0000000..bd977be
--- /dev/null
+++ b/Filtration/Views/ToolPanes/SectionBrowserView.xaml.cs
@@ -0,0 +1,10 @@
+namespace Filtration.Views.ToolPanes
+{
+    public partial class SectionBrowserView
+    {
+        public SectionBrowserView()
+        {
+            InitializeComponent();
+        }
+    }
+}