diff --git a/ApplicationView/PrinterModels.cs b/ApplicationView/PrinterModels.cs
index 46e619f65..4500473e6 100644
--- a/ApplicationView/PrinterModels.cs
+++ b/ApplicationView/PrinterModels.cs
@@ -660,6 +660,42 @@ namespace MatterHackers.MatterControl
 				}
 			}
 		}
+
+		public double SceneTreeHeight
+		{
+			get
+			{
+				if (double.TryParse(UserSettings.Instance.get(UserSettingsKey.SceneTreeHeight), out double controlHeight))
+				{
+					return Math.Max(controlHeight, 35);
+				}
+
+				return 35;
+			}
+			set
+			{
+				var minimumValue = Math.Max(value, 35);
+				UserSettings.Instance.set(UserSettingsKey.SceneTreeHeight, minimumValue.ToString());
+			}
+		}
+
+		public double SelectedObjectEditorHeight
+		{
+			get
+			{
+				if (double.TryParse(UserSettings.Instance.get(UserSettingsKey.SelectedObjectEditorHeight), out double controlHeight))
+				{
+					return Math.Max(controlHeight, 35);
+				}
+
+				return 120;
+			}
+			set
+			{
+				var minimumValue = Math.Max(value, 35);
+				UserSettings.Instance.set(UserSettingsKey.SelectedObjectEditorHeight, minimumValue.ToString());
+			}
+		}
 	}
 
 	public class PrinterViewState
@@ -768,42 +804,6 @@ namespace MatterHackers.MatterControl
 				UserSettings.Instance.set(UserSettingsKey.SelectedObjectPanelWidth, minimumValue.ToString());
 			}
 		}
-
-		public double SceneTreeHeight
-		{
-			get
-			{
-				if (double.TryParse(UserSettings.Instance.get(UserSettingsKey.SceneTreeHeight), out double controlHeight))
-				{
-					return Math.Max(controlHeight, 35);
-				}
-
-				return 35;
-			}
-			set
-			{
-				var minimumValue = Math.Max(value, 35);
-				UserSettings.Instance.set(UserSettingsKey.SceneTreeHeight, minimumValue.ToString());
-			}
-		}
-
-		public double SelectedObjectEditorHeight
-		{
-			get
-			{
-				if (double.TryParse(UserSettings.Instance.get(UserSettingsKey.SelectedObjectEditorHeight), out double controlHeight))
-				{
-					return Math.Max(controlHeight, 35);
-				}
-
-				return 120;
-			}
-			set
-			{
-				var minimumValue = Math.Max(value, 35);
-				UserSettings.Instance.set(UserSettingsKey.SelectedObjectEditorHeight, minimumValue.ToString());
-			}
-		}
 	}
 
 	public class PrinterConfig
diff --git a/CustomWidgets/TreeView/TreeNode.cs b/CustomWidgets/TreeView/TreeNode.cs
index d0acfd609..46ff08106 100644
--- a/CustomWidgets/TreeView/TreeNode.cs
+++ b/CustomWidgets/TreeView/TreeNode.cs
@@ -90,10 +90,18 @@ namespace MatterHackers.MatterControl.CustomWidgets.TreeView
 
 			this.TitleBar.AddChild(expandCheckBox);
 
+			this.SelectionBar = new FlowLayoutWidget()
+			{
+				VAnchor = VAnchor.Fit,
+				HAnchor = HAnchor.Fit,
+				Selectable = false
+			};
+			this.TitleBar.AddChild(this.SelectionBar);
+
 			// add a check box
 			if (Image != null)
 			{
-				this.TitleBar.AddChild(imageWidget = new ImageWidget(this.Image)
+				this.SelectionBar.AddChild(imageWidget = new ImageWidget(this.Image)
 				{
 					VAnchor = VAnchor.Center,
 					BackgroundColor = new Color(theme.Colors.PrimaryTextColor, 12),
@@ -101,7 +109,9 @@ namespace MatterHackers.MatterControl.CustomWidgets.TreeView
 					Selectable = false
 				});
 			};
-			this.TitleBar.AddChild(textWidget = new TextWidget(this.Text, pointSize: theme.DefaultFontSize, textColor: theme.Colors.PrimaryTextColor)
+
+
+			this.SelectionBar.AddChild(textWidget = new TextWidget(this.Text, pointSize: theme.DefaultFontSize, textColor: theme.Colors.PrimaryTextColor)
 			{
 				Selectable = false,
 				AutoExpandBoundsToText = true,
@@ -113,7 +123,7 @@ namespace MatterHackers.MatterControl.CustomWidgets.TreeView
 				HAnchor = HAnchor.Fit | HAnchor.Left,
 				Visible = false, // content starts out not visible
 				Name = "content",
-				Margin = new BorderDouble(25, 3),
+				Margin = new BorderDouble(12, 3),
 			};
 			AddChild(content);
 
@@ -122,6 +132,8 @@ namespace MatterHackers.MatterControl.CustomWidgets.TreeView
 
 		public FlowLayoutWidget TitleBar { get; }
 
+		public FlowLayoutWidget SelectionBar { get; }
+
 		public void BeginEdit()
 		{
 			throw new NotImplementedException();
@@ -378,7 +390,14 @@ namespace MatterHackers.MatterControl.CustomWidgets.TreeView
 		//     A TreeView that represents the parent tree view that the
 		//     tree node is assigned to, or null if the node has not been assigned to a tree
 		//     view.
-		public virtual TreeView TreeView => NodeParent.TreeView;
+
+		private TreeView _treeView;
+
+		public virtual TreeView TreeView
+		{
+			get => _treeView ?? NodeParent.TreeView;
+			set => _treeView = value;
+		}
 
 		private void OnImageChanged(EventArgs args)
 		{
diff --git a/CustomWidgets/TreeView/TreeView.cs b/CustomWidgets/TreeView/TreeView.cs
index 8c7e36526..858960094 100644
--- a/CustomWidgets/TreeView/TreeView.cs
+++ b/CustomWidgets/TreeView/TreeView.cs
@@ -29,40 +29,32 @@ either expressed or implied, of the FreeBSD Project.
 
 using System;
 using System.Collections;
-using System.Linq;
 using MatterHackers.Agg;
 using MatterHackers.Agg.UI;
 using MatterHackers.VectorMath;
 
 namespace MatterHackers.MatterControl.CustomWidgets.TreeView
 {
-	public class TopNode : TreeNode
+	public interface IVisualLeafNode
 	{
-		internal TreeView treeView;
-		public override TreeView TreeView => treeView;
 	}
 
 	public class TreeView : ScrollableWidget
 	{
 		private ThemeConfig theme;
 
-		public TreeView(TopNode topNode, ThemeConfig theme)
-			: this(topNode, 0, 0, theme)
+		public TreeView(ThemeConfig theme)
+			: this(0, 0, theme)
 		{
 		}
 
-		public TreeView(TopNode topNode, int width, int height, ThemeConfig theme)
+		public TreeView(int width, int height, ThemeConfig theme)
 			: base(width, height)
 		{
 			this.theme = theme;
 			this.AutoScroll = true;
 			this.HAnchor = HAnchor.Stretch;
 			this.VAnchor = VAnchor.Stretch;
-			this.TopNode = topNode;
-
-			topNode.treeView = this;
-
-			this.AddChild(TopNode);
 		}
 
 		#region Events
@@ -207,19 +199,20 @@ namespace MatterHackers.MatterControl.CustomWidgets.TreeView
 
 		public TreeNode SelectedNode
 		{
-			get => _selectedNode; set
+			get => _selectedNode;
+			set
 			{
 				if (value != _selectedNode)
 				{
 					OnBeforeSelect(null);
 
-					foreach (var node in this.Descendants<TreeNode>().Where((c) => c != value))
+					if (_selectedNode != null)
 					{
-						node.TitleBar.BackgroundColor = Color.Transparent;
+						_selectedNode.SelectionBar.BackgroundColor = Color.Transparent;
 					}
 
 					_selectedNode = value;
-					_selectedNode.TitleBar.BackgroundColor = theme.AccentMimimalOverlay;
+					_selectedNode.SelectionBar.BackgroundColor = theme.AccentMimimalOverlay;
 					OnAfterSelect(null);
 				}
 			}
@@ -230,7 +223,6 @@ namespace MatterHackers.MatterControl.CustomWidgets.TreeView
 		public bool ShowPlusMinus { get; set; }
 		public bool ShowRootLines { get; set; }
 		public bool Sorted { get; set; }
-		public TreeNode TopNode { get; }
 
 		public IComparer TreeViewNodeSorter { get; set; }
 
diff --git a/DesignTools/Operations/Object3DExtensions.cs b/DesignTools/Operations/Object3DExtensions.cs
index 2c5baaf33..47dcb0c5e 100644
--- a/DesignTools/Operations/Object3DExtensions.cs
+++ b/DesignTools/Operations/Object3DExtensions.cs
@@ -250,7 +250,7 @@ namespace MatterHackers.MatterControl.DesignTools.Operations
 
 			return currentTransform;
 		}
-
+		 
 		public static Vector3 GetCenter(this IObject3D item)
 		{
 			return item.GetAxisAlignedBoundingBox(Matrix4X4.Identity).Center;
diff --git a/DesignTools/Primitives/TextObject3D.cs b/DesignTools/Primitives/TextObject3D.cs
index 385f5b706..cacaeb0dd 100644
--- a/DesignTools/Primitives/TextObject3D.cs
+++ b/DesignTools/Primitives/TextObject3D.cs
@@ -37,6 +37,7 @@ using MatterHackers.Agg.VertexSource;
 using MatterHackers.DataConverters3D;
 using MatterHackers.DataConverters3D.UndoCommands;
 using MatterHackers.Localizations;
+using MatterHackers.MatterControl.CustomWidgets.TreeView;
 using MatterHackers.MatterControl.DesignTools.Operations;
 using MatterHackers.VectorMath;
 using Newtonsoft.Json;
@@ -44,7 +45,7 @@ using Newtonsoft.Json.Converters;
 
 namespace MatterHackers.MatterControl.DesignTools
 {
-	public class TextObject3D : Object3D, IPublicPropertyObject
+	public class TextObject3D : Object3D, IPublicPropertyObject, IVisualLeafNode
 	{
 		public TextObject3D()
 		{
diff --git a/PartPreviewWindow/Object3DTreeBuilder.cs b/PartPreviewWindow/Object3DTreeBuilder.cs
index 12d1ee034..717108dc6 100644
--- a/PartPreviewWindow/Object3DTreeBuilder.cs
+++ b/PartPreviewWindow/Object3DTreeBuilder.cs
@@ -31,52 +31,33 @@ using MatterHackers.Agg.UI;
 using MatterHackers.DataConverters3D;
 using MatterHackers.MatterControl.CustomWidgets;
 using MatterHackers.MatterControl.CustomWidgets.TreeView;
+using MatterHackers.MatterControl.DesignTools;
 using MatterHackers.MatterControl.Library;
+using MatterHackers.MatterControl.PartPreviewWindow.View3D;
 
 namespace MatterHackers.MatterControl.PartPreviewWindow
 {
 	public static class Object3DTreeBuilder
 	{
-		public static TreeView GetPartTreeView(IObject3D rootItem, ThemeConfig theme)
+		public static TreeNode BuildTree(IObject3D rootItem, ThemeConfig theme)
 		{
-			var topNode = new TopNode()
-			{
-				Text = BuildDefaultName(rootItem),
-				Tag = rootItem,
-				TextColor = theme.Colors.PrimaryTextColor,
-				PointSize = theme.DefaultFontSize
-			};
-
-			var treeView = new TreeView(topNode, theme)
-			{
-				TextColor = theme.Colors.PrimaryTextColor,
-				PointSize = theme.DefaultFontSize
-			};
-
-			treeView.SuspendLayout();
-
-			//selectionTreeNodes.Clear();
-			//selectionTreeNodes.Add(rootItem, topNode);
-
-			// add the children to the root node
-			foreach (var child in rootItem.Children)
-			{
-				AddTree(child, topNode, theme);
-			}
-
-			treeView.ResumeLayout();
-
-			return treeView;
+			return AddTree(rootItem, null, theme);
 		}
 
-		private static void AddTree(IObject3D item, TreeNode parent, ThemeConfig theme)
+		private static TreeNode AddTree(IObject3D item, TreeNode parent, ThemeConfig theme)
 		{
-			var node = AddItem(item, parent, theme);
+			// Suppress MeshWrapper nodes in treeview - retain parent node as context reference
+			var contextNode = (item is MeshWrapper) ? parent : AddItem(item, parent, theme);
 
-			foreach (var child in item.Children)
+			if (!(item is IVisualLeafNode))
 			{
-				AddTree(child, node, theme);
+				foreach (var child in item.Children)
+				{
+					AddTree(child, contextNode, theme);
+				}
 			}
+
+			return contextNode;
 		}
 
 		private static TreeNode AddItem(IObject3D item, TreeNode parentNode, ThemeConfig theme)
@@ -108,12 +89,16 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 					iconView.ImageSet += (s1, e1) =>
 					{
 						node.Image = iconView.imageWidget.Image;
+						node.Invalidate();
 					};
 				};
 			}
 
-			parentNode.Nodes.Add(node);
-			parentNode.Expanded = true;
+			if (parentNode != null)
+			{
+				parentNode.Nodes.Add(node);
+				parentNode.Expanded = true;
+			}
 
 			return node;
 		}
diff --git a/PartPreviewWindow/SelectedObjectPanel.cs b/PartPreviewWindow/SelectedObjectPanel.cs
index 3b420e9d2..27a3b21d1 100644
--- a/PartPreviewWindow/SelectedObjectPanel.cs
+++ b/PartPreviewWindow/SelectedObjectPanel.cs
@@ -48,9 +48,8 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 		private IObject3D item = new Object3D();
 
 		private ThemeConfig theme;
+		private BedConfig sceneContext;
 		private View3DWidget view3DWidget;
-		private InteractiveScene scene;
-		private PrinterConfig printer;
 		private SectionWidget editorSection;
 		private TextButton editButton;
 
@@ -58,7 +57,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 		private InlineTitleEdit inlineTitleEdit;
 		private BottomResizeContainer editorColumn;
 
-		public SelectedObjectPanel(View3DWidget view3DWidget, InteractiveScene scene, ThemeConfig theme, PrinterConfig printer)
+		public SelectedObjectPanel(View3DWidget view3DWidget, BedConfig sceneContext, ThemeConfig theme)
 			: base(FlowDirection.TopToBottom)
 		{
 			this.HAnchor = HAnchor.Stretch;
@@ -66,8 +65,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			this.Padding = 0;
 			this.view3DWidget = view3DWidget;
 			this.theme = theme;
-			this.scene = scene;
-			this.printer = printer;
+			this.sceneContext = sceneContext;
 
 			this.ContentPanel = new FlowLayoutWidget(FlowDirection.TopToBottom)
 			{
@@ -91,7 +89,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			{
 				HAnchor = HAnchor.Stretch,
 				VAnchor = VAnchor.Absolute,
-				Height = printer.ViewState.SelectedObjectEditorHeight
+				Height = sceneContext.ViewState.SelectedObjectEditorHeight
 			};
 
 			var toolbar = new Toolbar(theme)
@@ -102,6 +100,8 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			};
 			editorColumn.AddChild(toolbar);
 
+			var scene = sceneContext.Scene;
+
 			editButton = new TextButton("Edit".Localize(), theme)
 			{
 				BackgroundColor = theme.MinimalShade,
@@ -252,11 +252,6 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 		public void SetActiveItem(IObject3D selectedItem)
 		{
-			if (!scene.HasSelection)
-			{
-				this.Parent.Visible = false;
-				return;
-			}
 
 			var selectedItemType = selectedItem.GetType();
 
@@ -266,8 +261,6 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 			this.item = selectedItem;
 
-			var viewMode = printer?.ViewState.ViewMode;
-
 			HashSet<IObject3DEditor> mappedEditors = ApplicationController.Instance.GetEditorsForType(selectedItemType);
 
 			var activeEditors = new List<(IObject3DEditor, IObject3D, string)>();
@@ -358,7 +351,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 							button.EnsureAvailablity();
 							button.Click += (s, e) =>
 							{
-								nodeOperation.Operation(selectedItem, scene).ConfigureAwait(false);
+								nodeOperation.Operation(selectedItem, sceneContext.Scene).ConfigureAwait(false);
 							};
 
 							buttons.Add(button);
@@ -410,7 +403,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 		public override void OnClosed(ClosedEventArgs e)
 		{
-			printer.ViewState.SelectedObjectEditorHeight = editorColumn.Height;
+			sceneContext.ViewState.SelectedObjectEditorHeight = editorColumn.Height;
 			base.OnClosed(e);
 		}
 	}
diff --git a/PartPreviewWindow/View3D/View3DWidget.cs b/PartPreviewWindow/View3D/View3DWidget.cs
index 2bb6af5a3..6147a2983 100644
--- a/PartPreviewWindow/View3D/View3DWidget.cs
+++ b/PartPreviewWindow/View3D/View3DWidget.cs
@@ -149,7 +149,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 			TrackballTumbleWidget.TransformState = TrackBallTransformType.Rotation;
 
-			selectedObjectPanel = new SelectedObjectPanel(this, Scene, theme, printer)
+			selectedObjectPanel = new SelectedObjectPanel(this, sceneContext, theme)
 			{
 				VAnchor = VAnchor.Stretch,
 			};
@@ -187,12 +187,23 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			{
 				HAnchor = HAnchor.Stretch,
 				VAnchor = VAnchor.Absolute,
-				Height = Printer.ViewState.SceneTreeHeight
+				Height = sceneContext.ViewState.SceneTreeHeight
 			};
 			modelViewSidePanel.AddChild(treeSection);
 
 			// add the tree view
-			this.RebuildTreeSection(new Object3D(), theme);
+			treeView = new TreeView(theme)
+			{
+				TextColor = theme.Colors.PrimaryTextColor,
+				PointSize = theme.DefaultFontSize,
+				HAnchor =HAnchor.Stretch,
+				VAnchor = VAnchor.Stretch
+			};
+			treeView.AfterSelect += (s, e) =>
+			{
+				selectedObjectPanel.SetActiveItem((IObject3D)treeView.SelectedNode.Tag);
+			};
+			treeSection.AddChild(treeView);
 
 			modelViewSidePanel.AddChild(selectedObjectPanel);
 			splitContainer.AddChild(modelViewSidePanel);
@@ -236,24 +247,6 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			}
 		}
 
-		private void RebuildTreeSection(IObject3D selection, ThemeConfig theme)
-		{
-			treeSection.CloseAllChildren();
-
-			treeView = Object3DTreeBuilder.GetPartTreeView(selection, theme);
-			treeSection.AddChild(treeView);
-			treeView.AfterSelect += (s, e) =>
-			{
-				selectedObjectPanel.SetActiveItem((IObject3D)treeView.SelectedNode.Tag);
-			};
-
-			if (this.Parent != null)
-			{
-				treeView.TopNode.Padding = treeView.TopNode.Padding.Clone(left: 8, top: 8);
-				treeView.SelectedNode = treeView.TopNode;
-			}
-		}
-
 		private void UpdateRenderView(object sender, EventArgs e)
 		{
 			TrackballTumbleWidget.CenterOffsetX  = -modelViewSidePanel.Width;
@@ -365,10 +358,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 		public override void OnClosed(ClosedEventArgs e)
 		{
-			if (Printer != null)
-			{
-				Printer.ViewState.SceneTreeHeight = treeSection.Height;
-			}
+			sceneContext.ViewState.SceneTreeHeight = treeSection.Height;
 
 			viewControls3D.TransformStateChanged -= ViewControls3D_TransformStateChanged;
 			Scene.SelectionChanged -= Scene_SelectionChanged;
@@ -689,11 +679,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 				if (e == null)
 				{
 					Scene.ClearSelection();
-
-					foreach (var sceneItem in matchingSceneChildren.ToList())
-					{
-						Scene.AddToSelection(sceneItem);
-					}
+					Scene.SetSelection(matchingSceneChildren.ToList());
 				}
 				else
 				{
@@ -1225,9 +1211,20 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			}
 
 			// Top level selection only - rebuild tree
-			if (Scene.Children.Contains(Scene.SelectedItem))
+			var selection = Scene.SelectedItem;
+			if (Scene.Children.Contains(selection))
 			{
-				this.RebuildTreeSection(Scene.SelectedItem, theme);
+				treeView.ScrollArea.CloseAllChildren();
+
+				var rootNode = Object3DTreeBuilder.BuildTree(selection, theme);
+				treeView.AddChild(rootNode);
+				rootNode.TreeView = treeView;
+
+				if (this.Parent != null)
+				{
+					rootNode.Padding = rootNode.Padding.Clone(left: 8, top: 8);
+					treeView.SelectedNode = rootNode;
+				}
 			}
 		}
 
diff --git a/Submodules/agg-sharp b/Submodules/agg-sharp
index a38d5e68b..44c6128a0 160000
--- a/Submodules/agg-sharp
+++ b/Submodules/agg-sharp
@@ -1 +1 @@
-Subproject commit a38d5e68bcaace904d1dc18e416ea9ace6756ac2
+Subproject commit 44c6128a05217f6ca0a928e7061e087c05173d08