Index: Core/Plugins/src/Core.Plugins.CommonTools.Gui/Commands/Charting/ChartViewCommandBase.cs
===================================================================
diff -u -r3bfa4dc5fb5ea3560752479de86cb843419f8fe3 -rb0df2017d77cc00832a846a46518a2c96f927247
--- Core/Plugins/src/Core.Plugins.CommonTools.Gui/Commands/Charting/ChartViewCommandBase.cs	(.../ChartViewCommandBase.cs)	(revision 3bfa4dc5fb5ea3560752479de86cb843419f8fe3)
+++ Core/Plugins/src/Core.Plugins.CommonTools.Gui/Commands/Charting/ChartViewCommandBase.cs	(.../ChartViewCommandBase.cs)	(revision b0df2017d77cc00832a846a46518a2c96f927247)
@@ -31,12 +31,12 @@
         /// Gets the currently active view if it is a <see cref="ChartView"/> and
         /// <c>null</c> otherwise.
         /// </summary>
-        protected ChartView View
+        protected IChartView View
         {
             get
             {
                 return Gui != null
-                           ? Gui.DocumentViews.ActiveView as ChartView
+                           ? Gui.DocumentViews.ActiveView as IChartView
                            : null;
             }
         }
Index: Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/ChartViewCommandBaseTest.cs
===================================================================
diff -u -r3bfa4dc5fb5ea3560752479de86cb843419f8fe3 -rb0df2017d77cc00832a846a46518a2c96f927247
--- Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/ChartViewCommandBaseTest.cs	(.../ChartViewCommandBaseTest.cs)	(revision 3bfa4dc5fb5ea3560752479de86cb843419f8fe3)
+++ Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/ChartViewCommandBaseTest.cs	(.../ChartViewCommandBaseTest.cs)	(revision b0df2017d77cc00832a846a46518a2c96f927247)
@@ -181,7 +181,7 @@
                 return base.GetChangedFontSize(font, points);
             }
 
-            public ChartView GetView()
+            public IChartView GetView()
             {
                 return View;
             }
Index: Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/DecreaseFontSizeCommandTest.cs
===================================================================
diff -u
--- Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/DecreaseFontSizeCommandTest.cs	(revision 0)
+++ Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/DecreaseFontSizeCommandTest.cs	(revision b0df2017d77cc00832a846a46518a2c96f927247)
@@ -0,0 +1,95 @@
+using System.Drawing;
+using Core.Common.Controls.Swf.Charting;
+using Core.Common.Gui;
+using Core.Common.Test.TestObjects;
+using Core.Plugins.CommonTools.Gui.Commands.Charting;
+using NUnit.Framework;
+using Rhino.Mocks;
+
+namespace Core.Plugins.CommonTools.Gui.Test.Commands.Charting
+{
+    [TestFixture]
+    public class DecreaseFontSizeCommandTest
+    {
+        private MockRepository mocks;
+        private IGui gui;
+        private IViewList documentsView;
+
+        [SetUp]
+        public void SetUp()
+        {
+            mocks = new MockRepository();
+            gui = mocks.StrictMock<IGui>();
+            documentsView = mocks.StrictMock<IViewList>();
+            gui.Expect(g => g.DocumentViews).Return(documentsView);
+        }
+
+        [Test]
+        public void Execute_WithActiveChartView_FontSizesDecreasedByOne()
+        {
+            // Setup
+            IChart chart = new Chart();
+            var view = new ChartView
+            {
+                Chart = chart
+            };
+            var command = new DecreaseFontSizeCommand
+            {
+                Gui = gui
+            };
+
+            documentsView.Expect(dv => dv.ActiveView).Return(view);
+
+            var family = FontFamily.GenericSansSerif;
+            var size = 12;
+
+            chart.Font = new Font(family, size);
+            chart.Legend.Font = new Font(family, size);
+            chart.LeftAxis.LabelsFont = new Font(family, size);
+            chart.LeftAxis.TitleFont = new Font(family, size);
+            chart.BottomAxis.LabelsFont = new Font(family, size);
+            chart.BottomAxis.TitleFont = new Font(family, size);
+            chart.RightAxis.LabelsFont = new Font(family, size);
+            chart.RightAxis.TitleFont = new Font(family, size);
+
+            mocks.ReplayAll();
+
+            // Call
+            command.Execute();
+
+            // Assert
+            var expectedSize = size - 1;
+            Assert.AreEqual(expectedSize, chart.Font.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.Legend.Font.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.LeftAxis.LabelsFont.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.LeftAxis.TitleFont.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.BottomAxis.LabelsFont.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.BottomAxis.TitleFont.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.RightAxis.LabelsFont.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.RightAxis.TitleFont.SizeInPoints);
+
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        public void Execute_WithActiveOtherView_DoesNotThrow()
+        {
+            // Setup
+            var view = new TestView();
+            var command = new DecreaseFontSizeCommand
+            {
+                Gui = gui
+            };
+
+            documentsView.Expect(dv => dv.ActiveView).Return(view);
+
+            mocks.ReplayAll();
+
+            // Call
+            command.Execute();
+
+            // Assert
+            mocks.VerifyAll();
+        }
+    }
+}
\ No newline at end of file
Index: Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/ExportChartAsImageCommandTest.cs
===================================================================
diff -u
--- Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/ExportChartAsImageCommandTest.cs	(revision 0)
+++ Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/ExportChartAsImageCommandTest.cs	(revision b0df2017d77cc00832a846a46518a2c96f927247)
@@ -0,0 +1,69 @@
+using Core.Common.Controls.Swf.Charting;
+using Core.Common.Gui;
+using Core.Common.Test.TestObjects;
+using Core.Plugins.CommonTools.Gui.Commands.Charting;
+using NUnit.Framework;
+using Rhino.Mocks;
+
+namespace Core.Plugins.CommonTools.Gui.Test.Commands.Charting
+{
+    [TestFixture]
+    public class ExportChartAsImageCommandTest
+    {
+        private MockRepository mocks;
+        private IGui gui;
+        private IViewList documentsView;
+
+        [SetUp]
+        public void SetUp()
+        {
+            mocks = new MockRepository();
+            gui = mocks.StrictMock<IGui>();
+            documentsView = mocks.StrictMock<IViewList>();
+            gui.Expect(g => g.DocumentViews).Return(documentsView);
+        }
+
+        [Test]
+        public void Execute_WithActiveChartView_CallsExportAsImage()
+        {
+            // Setup
+            var chartView = mocks.StrictMock<IChartView>();
+            chartView.Expect(cv => cv.ExportAsImage());
+            documentsView.Expect(dv => dv.ActiveView).Return(chartView);
+
+            mocks.ReplayAll();
+
+            var command = new ExportChartAsImageCommand
+            {
+                Gui = gui
+            };
+
+            // Call
+            command.Execute();
+
+            // Assert
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        public void Execute_WithActiveOtherView_DoesNotThrow()
+        {
+            // Setup
+            var view = new TestView();
+            var command = new IncreaseFontSizeCommand
+            {
+                Gui = gui
+            };
+
+            documentsView.Expect(dv => dv.ActiveView).Return(view);
+
+            mocks.ReplayAll();
+
+            // Call
+            command.Execute();
+
+            // Assert
+            mocks.VerifyAll();
+        }
+    }
+}
\ No newline at end of file
Index: Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/IncreaseFontSizeCommandTest.cs
===================================================================
diff -u
--- Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/IncreaseFontSizeCommandTest.cs	(revision 0)
+++ Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Commands/Charting/IncreaseFontSizeCommandTest.cs	(revision b0df2017d77cc00832a846a46518a2c96f927247)
@@ -0,0 +1,95 @@
+using System.Drawing;
+using Core.Common.Controls.Swf.Charting;
+using Core.Common.Gui;
+using Core.Common.Test.TestObjects;
+using Core.Plugins.CommonTools.Gui.Commands.Charting;
+using NUnit.Framework;
+using Rhino.Mocks;
+
+namespace Core.Plugins.CommonTools.Gui.Test.Commands.Charting
+{
+    [TestFixture]
+    public class IncreaseFontSizeCommandTest
+    {
+        private MockRepository mocks;
+        private IGui gui;
+        private IViewList documentsView;
+
+        [SetUp]
+        public void SetUp()
+        {
+            mocks = new MockRepository();
+            gui = mocks.StrictMock<IGui>();
+            documentsView = mocks.StrictMock<IViewList>();
+            gui.Expect(g => g.DocumentViews).Return(documentsView);
+        }
+
+        [Test]
+        public void Execute_WithActiveChartView_FontSizesDecreasedByOne()
+        {
+            // Setup
+            IChart chart = new Chart();
+            var view = new ChartView
+            {
+                Chart = chart
+            };
+            var command = new IncreaseFontSizeCommand
+            {
+                Gui = gui
+            };
+
+            documentsView.Expect(dv => dv.ActiveView).Return(view);
+
+            var family = FontFamily.GenericSansSerif;
+            var size = 12;
+
+            chart.Font = new Font(family, size);
+            chart.Legend.Font = new Font(family, size);
+            chart.LeftAxis.LabelsFont = new Font(family, size);
+            chart.LeftAxis.TitleFont = new Font(family, size);
+            chart.BottomAxis.LabelsFont = new Font(family, size);
+            chart.BottomAxis.TitleFont = new Font(family, size);
+            chart.RightAxis.LabelsFont = new Font(family, size);
+            chart.RightAxis.TitleFont = new Font(family, size);
+
+            mocks.ReplayAll();
+
+            // Call
+            command.Execute();
+
+            // Assert
+            var expectedSize = size + 1;
+            Assert.AreEqual(expectedSize, chart.Font.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.Legend.Font.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.LeftAxis.LabelsFont.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.LeftAxis.TitleFont.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.BottomAxis.LabelsFont.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.BottomAxis.TitleFont.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.RightAxis.LabelsFont.SizeInPoints);
+            Assert.AreEqual(expectedSize, chart.RightAxis.TitleFont.SizeInPoints);
+
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        public void Execute_WithActiveOtherView_DoesNotThrow()
+        {
+            // Setup
+            var view = new TestView();
+            var command = new IncreaseFontSizeCommand
+            {
+                Gui = gui
+            };
+
+            documentsView.Expect(dv => dv.ActiveView).Return(view);
+
+            mocks.ReplayAll();
+
+            // Call
+            command.Execute();
+
+            // Assert
+            mocks.VerifyAll();
+        }
+    }
+}
\ No newline at end of file
Index: Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Core.Plugins.CommonTools.Gui.Test.csproj
===================================================================
diff -u -r3bfa4dc5fb5ea3560752479de86cb843419f8fe3 -rb0df2017d77cc00832a846a46518a2c96f927247
--- Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Core.Plugins.CommonTools.Gui.Test.csproj	(.../Core.Plugins.CommonTools.Gui.Test.csproj)	(revision 3bfa4dc5fb5ea3560752479de86cb843419f8fe3)
+++ Core/Plugins/test/Core.Plugins.CommonTools.Gui.Test/Core.Plugins.CommonTools.Gui.Test.csproj	(.../Core.Plugins.CommonTools.Gui.Test.csproj)	(revision b0df2017d77cc00832a846a46518a2c96f927247)
@@ -77,6 +77,9 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Commands\Charting\ChartViewCommandBaseTest.cs" />
+    <Compile Include="Commands\Charting\DecreaseFontSizeCommandTest.cs" />
+    <Compile Include="Commands\Charting\ExportChartAsImageCommandTest.cs" />
+    <Compile Include="Commands\Charting\IncreaseFontSizeCommandTest.cs" />
     <Compile Include="Forms\Charting\ChartTreeNodePresenterTest.cs" />
     <Compile Include="TestViewList.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />