Index: Core/Components/src/Core.Components.OxyPlot.Forms/BaseChart.cs
===================================================================
diff -u -r570101d9648e296b96c7e624c4d4f6bfad8d41b6 -r51a1d01aacd31638434df31702386d9a8c8f9a17
--- Core/Components/src/Core.Components.OxyPlot.Forms/BaseChart.cs	(.../BaseChart.cs)	(revision 570101d9648e296b96c7e624c4d4f6bfad8d41b6)
+++ Core/Components/src/Core.Components.OxyPlot.Forms/BaseChart.cs	(.../BaseChart.cs)	(revision 51a1d01aacd31638434df31702386d9a8c8f9a17)
@@ -3,6 +3,7 @@
 using Core.Components.OxyPlot.Properties;
 using OxyPlot;
 using OxyPlot.Axes;
+using OxyPlot.Series;
 using OxyPlot.WindowsForms;
 
 namespace Core.Components.OxyPlot.Forms
@@ -46,14 +47,16 @@
                 Position = AxisPosition.Bottom,
                 TickStyle = TickStyle.None,
                 ExtraGridlines = new[] { 0.0 },
-                ExtraGridlineThickness = 1
+                ExtraGridlineThickness = 1,
+                Layer = AxisLayer.AboveSeries
             };
             yAxis = new LinearAxis
             {
                 Title = Resources.BaseChart_YAxisTitle,
                 TickStyle = TickStyle.None,
                 ExtraGridlines = new[] { 0.0 },
-                ExtraGridlineThickness = 1
+                ExtraGridlineThickness = 1,
+                Layer = AxisLayer.AboveSeries
             };
             Model.Axes.Add(xAxis);
             Model.Axes.Add(yAxis);
@@ -80,5 +83,24 @@
         {
             Model.Series.Clear();
         }
+
+        /// <summary>
+        /// Sets the visibility of a series in this <see cref="BaseChart"/>.
+        /// </summary>
+        /// <param name="series">The <see cref="IChartData"/> to set the visibility for.</param>
+        /// <param name="visibility">A boolean value representing the new visibility of the <paramref name="series"/>.</param>
+        public void SetVisibility(IChartData series, bool visibility)
+        {
+            var chartData = series as Series;
+            if (chartData != null)
+            {
+                chartData.IsVisible = visibility;
+                Invalidate();
+            }
+            else
+            {
+                throw new ArgumentException("Visibility set for IChartData which was not of type Series.");
+            }
+        }
     }
 }
\ No newline at end of file
Index: Core/Plugins/src/Core.Plugins.OxyPlot/Commands/OpenChartViewCommand.cs
===================================================================
diff -u -r03d5df1364557b6f4a184908affb7754e58b3fa4 -r51a1d01aacd31638434df31702386d9a8c8f9a17
--- Core/Plugins/src/Core.Plugins.OxyPlot/Commands/OpenChartViewCommand.cs	(.../OpenChartViewCommand.cs)	(revision 03d5df1364557b6f4a184908affb7754e58b3fa4)
+++ Core/Plugins/src/Core.Plugins.OxyPlot/Commands/OpenChartViewCommand.cs	(.../OpenChartViewCommand.cs)	(revision 51a1d01aacd31638434df31702386d9a8c8f9a17)
@@ -2,6 +2,7 @@
 using System.Collections.ObjectModel;
 using Core.Common.Gui;
 using Core.Components.OxyPlot.Data;
+using OxyPlot;
 
 namespace Core.Plugins.OxyPlot.Commands
 {
@@ -41,6 +42,14 @@
                 new Tuple<double, double>(0.0, 0.5),
                 new Tuple<double, double>(0.0, 1.1)
             });
+            var clearArea = new AreaData(new Collection<Tuple<double, double>>
+            {
+                new Tuple<double, double>(0.5, 0.5),    
+                new Tuple<double, double>(0.5, 1.0),
+                new Tuple<double, double>(1.0, 1.0),
+                new Tuple<double, double>(0.5, 0.5)
+            });
+            clearArea.Fill = OxyColor.FromArgb(255,255,255,255);
             var points = new PointData(new Collection<Tuple<double, double>>
             {
                 new Tuple<double, double>(0.0, 1.1),    
@@ -49,6 +58,7 @@
             });
             var data = new CollectionData();
             data.Add(area);
+            data.Add(clearArea);
             data.Add(line);
             data.Add(points);
             Gui.DocumentViewsResolver.OpenViewForData(data);
Index: Core/Plugins/src/Core.Plugins.OxyPlot/Legend/ChartDataNodePresenter.cs
===================================================================
diff -u -r570101d9648e296b96c7e624c4d4f6bfad8d41b6 -r51a1d01aacd31638434df31702386d9a8c8f9a17
--- Core/Plugins/src/Core.Plugins.OxyPlot/Legend/ChartDataNodePresenter.cs	(.../ChartDataNodePresenter.cs)	(revision 570101d9648e296b96c7e624c4d4f6bfad8d41b6)
+++ Core/Plugins/src/Core.Plugins.OxyPlot/Legend/ChartDataNodePresenter.cs	(.../ChartDataNodePresenter.cs)	(revision 51a1d01aacd31638434df31702386d9a8c8f9a17)
@@ -1,3 +1,4 @@
+using System.ComponentModel;
 using Core.Common.Controls.TreeView;
 using Core.Components.OxyPlot.Data;
 
@@ -23,6 +24,13 @@
             {
                 node.Image = Properties.Resources.PointsIcon;
             }
+            node.ShowCheckBox = true;
+            node.Checked = true;
         }
+
+        public override void OnNodeChecked(TreeNode node)
+        {
+            ((LegendTreeView) TreeView).Chart.SetVisibility((IChartData)node.Tag, node.Checked);
+        }
     }
 }
\ No newline at end of file
Index: Core/Plugins/src/Core.Plugins.OxyPlot/Legend/LegendTreeView.cs
===================================================================
diff -u -r570101d9648e296b96c7e624c4d4f6bfad8d41b6 -r51a1d01aacd31638434df31702386d9a8c8f9a17
--- Core/Plugins/src/Core.Plugins.OxyPlot/Legend/LegendTreeView.cs	(.../LegendTreeView.cs)	(revision 570101d9648e296b96c7e624c4d4f6bfad8d41b6)
+++ Core/Plugins/src/Core.Plugins.OxyPlot/Legend/LegendTreeView.cs	(.../LegendTreeView.cs)	(revision 51a1d01aacd31638434df31702386d9a8c8f9a17)
@@ -1,4 +1,5 @@
-using Core.Common.Controls.TreeView;
+using Core.Components.OxyPlot.Forms;
+using TreeView = Core.Common.Controls.TreeView.TreeView;
 
 namespace Core.Plugins.OxyPlot.Legend
 {
@@ -9,5 +10,22 @@
             RegisterNodePresenter(new ChartDataNodePresenter());
             RegisterNodePresenter(new ChartNodePresenter());
         }
+
+        public BaseChart Chart
+        {
+            get
+            {
+                return (BaseChart)Data;
+            }
+            set
+            {
+                Data = value;
+                
+                if (value == null)
+                {
+                    Nodes.Clear();
+                }
+            }
+        }
     }
 }
\ No newline at end of file
Index: Core/Plugins/src/Core.Plugins.OxyPlot/Legend/LegendView.cs
===================================================================
diff -u -r10a16f2a08c6a50176351ae46c9a23a37ab92e28 -r51a1d01aacd31638434df31702386d9a8c8f9a17
--- Core/Plugins/src/Core.Plugins.OxyPlot/Legend/LegendView.cs	(.../LegendView.cs)	(revision 10a16f2a08c6a50176351ae46c9a23a37ab92e28)
+++ Core/Plugins/src/Core.Plugins.OxyPlot/Legend/LegendView.cs	(.../LegendView.cs)	(revision 51a1d01aacd31638434df31702386d9a8c8f9a17)
@@ -11,11 +11,6 @@
     public sealed partial class LegendView : UserControl, IView
     {
         /// <summary>
-        /// The chart for which this view should show data.
-        /// </summary>
-        private BaseChart chart;
-
-        /// <summary>
         /// Creates a new instance of <see cref="LegendView"/>.
         /// </summary>
         public LegendView()
@@ -28,32 +23,24 @@
         {
             get
             {
-                return chart;
+                return seriesTree.Chart;
             }
             set
             {
-                chart = (BaseChart) value;
-                UpdateTree();
+                UpdateTree((BaseChart)value);
             }
         }
 
         /// <summary>
         /// Updates the tree with the current state of the chart.
         /// </summary>
-        private void UpdateTree()
+        private void UpdateTree(BaseChart data)
         {
             if (IsDisposed)
             {
                 return;
             }
-            if (chart != null)
-            {
-                seriesTree.Data = chart;
-            }
-            else
-            {
-                seriesTree.Nodes.Clear();
-            }
+            seriesTree.Chart = data;
         }
     }
 }
\ No newline at end of file
Index: Core/Plugins/src/Core.Plugins.OxyPlot/Legend/LegendView.resx
===================================================================
diff -u -r5a98830aee77b1ee0158c11ba5cccffc656226e0 -r51a1d01aacd31638434df31702386d9a8c8f9a17
--- Core/Plugins/src/Core.Plugins.OxyPlot/Legend/LegendView.resx	(.../LegendView.resx)	(revision 5a98830aee77b1ee0158c11ba5cccffc656226e0)
+++ Core/Plugins/src/Core.Plugins.OxyPlot/Legend/LegendView.resx	(.../LegendView.resx)	(revision 51a1d01aacd31638434df31702386d9a8c8f9a17)
@@ -142,7 +142,7 @@
     <value>seriesTree</value>
   </data>
   <data name="&gt;&gt;seriesTree.Type" xml:space="preserve">
-    <value>Core.Plugins.OxyPlot.Legend.LegendTreeView, Core.Plugins.OxyPlot, Version=0.5.0.1508, Culture=neutral, PublicKeyToken=null</value>
+    <value>Core.Plugins.OxyPlot.Legend.LegendTreeView, Core.Plugins.OxyPlot, Version=0.5.0.1530, Culture=neutral, PublicKeyToken=null</value>
   </data>
   <data name="&gt;&gt;seriesTree.Parent" xml:space="preserve">
     <value>$this</value>
Index: Core/Plugins/test/Core.Plugins.OxyPlot.Test/Legend/ChartDataNodePresenterTest.cs
===================================================================
diff -u -r10a16f2a08c6a50176351ae46c9a23a37ab92e28 -r51a1d01aacd31638434df31702386d9a8c8f9a17
--- Core/Plugins/test/Core.Plugins.OxyPlot.Test/Legend/ChartDataNodePresenterTest.cs	(.../ChartDataNodePresenterTest.cs)	(revision 10a16f2a08c6a50176351ae46c9a23a37ab92e28)
+++ Core/Plugins/test/Core.Plugins.OxyPlot.Test/Legend/ChartDataNodePresenterTest.cs	(.../ChartDataNodePresenterTest.cs)	(revision 51a1d01aacd31638434df31702386d9a8c8f9a17)
@@ -26,7 +26,7 @@
         }
 
         [Test]
-        public void UpdateNode_ForPointData_SetsTextAndIcon()
+        public void UpdateNode_ForPointData_SetsProperties()
         {
             // Setup
             var nodePresenter = new ChartDataNodePresenter();
@@ -37,6 +37,8 @@
 
             // Assert
             Assert.AreEqual("PointData", treeNode.Text);
+            Assert.IsTrue(treeNode.ShowCheckBox);
+            Assert.IsTrue(treeNode.Checked);
             TestHelper.AssertImagesAreEqual(Resources.PointsIcon, treeNode.Image);
         }
 
Index: Core/Plugins/test/Core.Plugins.OxyPlot.Test/OxyPlotGuiPluginTest.cs
===================================================================
diff -u -rb6dea7374102ce7e7a8f13cf127ea01c36e03eb9 -r51a1d01aacd31638434df31702386d9a8c8f9a17
--- Core/Plugins/test/Core.Plugins.OxyPlot.Test/OxyPlotGuiPluginTest.cs	(.../OxyPlotGuiPluginTest.cs)	(revision b6dea7374102ce7e7a8f13cf127ea01c36e03eb9)
+++ Core/Plugins/test/Core.Plugins.OxyPlot.Test/OxyPlotGuiPluginTest.cs	(.../OxyPlotGuiPluginTest.cs)	(revision 51a1d01aacd31638434df31702386d9a8c8f9a17)
@@ -145,11 +145,8 @@
                 gui.DocumentViews.ActiveView = viewMock;
                 var legendView = gui.ToolWindowViews.First(t => t is LegendView);
 
-                gui.ToolWindowViews.Remove(legendView);
+                legendView.Data = null;
 
-                // Precondition
-                Assert.IsNull(legendView.Data);
-
                 // When
                 plugin.OpenToolView(legendView);