diff --git a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/WaveformViewerFactory.java b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/WaveformViewFactory.java
similarity index 65%
rename from plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/WaveformViewerFactory.java
rename to plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/WaveformViewFactory.java
index 4dce3e2..3401c24 100644
--- a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/WaveformViewerFactory.java
+++ b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/WaveformViewFactory.java
@@ -12,15 +12,15 @@ package com.minres.scviewer.database.swt;
 
 import org.eclipse.swt.widgets.Composite;
 
-import com.minres.scviewer.database.swt.internal.WaveformViewer;
-import com.minres.scviewer.database.ui.IWaveformViewer;
-import com.minres.scviewer.database.ui.IWaveformViewerFactory;
+import com.minres.scviewer.database.swt.internal.WaveformView;
+import com.minres.scviewer.database.ui.IWaveformView;
+import com.minres.scviewer.database.ui.IWaveformViewFactory;
 
-public class WaveformViewerFactory implements IWaveformViewerFactory {
+public class WaveformViewFactory implements IWaveformViewFactory {
 
 	@Override
-	public IWaveformViewer createPanel(Composite parent) {
-		return new WaveformViewer(parent);
+	public IWaveformView createPanel(Composite parent) {
+		return new WaveformView(parent);
 	}
 
 }
diff --git a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformCanvas.java b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformCanvas.java
index d65180a..c20038d 100644
--- a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformCanvas.java
+++ b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformCanvas.java
@@ -25,6 +25,7 @@ import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.graphics.Rectangle;
@@ -40,7 +41,7 @@ import com.minres.scviewer.database.ITx;
 import com.minres.scviewer.database.IWaveform;
 import com.minres.scviewer.database.RelationType;
 import com.minres.scviewer.database.swt.Constants;
-import com.minres.scviewer.database.ui.IWaveformViewer;
+import com.minres.scviewer.database.ui.IWaveformView;
 import com.minres.scviewer.database.ui.TrackEntry;
 import com.minres.scviewer.database.ui.WaveformColors;
 
@@ -48,6 +49,8 @@ public class WaveformCanvas extends Canvas {
 	
     Color[] colors = new Color[WaveformColors.values().length];
 
+    private boolean doubleBuffering = true;
+    	
     private int trackHeight = 50;
     
     private long scaleFactor = 1000000L; // 1ns
@@ -110,7 +113,7 @@ public class WaveformCanvas extends Canvas {
         painterList.add(trackAreaPainter);
         rulerPainter=new RulerPainter(this);
         painterList.add(rulerPainter);
-        arrowPainter=new ArrowPainter(this, IWaveformViewer.NEXT_PREV_IN_STREAM);
+        arrowPainter=new ArrowPainter(this, IWaveformView.NEXT_PREV_IN_STREAM);
         painterList.add(arrowPainter);
 		CursorPainter cp = new CursorPainter(this, scaleFactor * 10, cursorPainters.size()-1);
 		painterList.add(cp);
@@ -398,7 +401,18 @@ public class WaveformCanvas extends Canvas {
     /* Paint function */
     private void paint(GC gc) {
         Rectangle clientRect = getClientArea(); /* Canvas' painting area */
-        Projection p = new Projection(gc);
+        GC thisGc = gc;
+        Image d_backingImg = null;
+        if(doubleBuffering) {
+            Point p = getSize();
+            d_backingImg = new Image(getDisplay(), p.x, p.y);
+            thisGc = new GC(d_backingImg);
+            thisGc.setBackground(gc.getBackground());
+            thisGc.setForeground(gc.getForeground());
+            thisGc.setFont(gc.getFont());
+            
+        }
+        Projection p = new Projection(thisGc);
         p.setTranslation(origin);
         if (painterList.size() > 0 ) {
             for (IPainter painter : painterList)
@@ -407,6 +421,11 @@ public class WaveformCanvas extends Canvas {
             gc.fillRectangle(clientRect);
             initScrollBars();
         }
+        if(doubleBuffering) {
+            gc.drawImage(d_backingImg, 0, 0);
+            d_backingImg.dispose();
+            thisGc.dispose();
+        }
     }
 
     public List<Object> getElementsAt(Point point) {
diff --git a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformViewer.java b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformView.java
similarity index 99%
rename from plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformViewer.java
rename to plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformView.java
index 7cc3267..bff0e80 100644
--- a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformViewer.java
+++ b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/WaveformView.java
@@ -89,11 +89,11 @@ import com.minres.scviewer.database.RelationType;
 import com.minres.scviewer.database.swt.Constants;
 import com.minres.scviewer.database.ui.GotoDirection;
 import com.minres.scviewer.database.ui.ICursor;
-import com.minres.scviewer.database.ui.IWaveformViewer;
+import com.minres.scviewer.database.ui.IWaveformView;
 import com.minres.scviewer.database.ui.TrackEntry;
 import com.minres.scviewer.database.ui.WaveformColors;
 
-public class WaveformViewer implements IWaveformViewer  {
+public class WaveformView implements IWaveformView  {
 
 	private ListenerList<ISelectionChangedListener> selectionChangedListeners = new ListenerList<ISelectionChangedListener>();
 
@@ -185,8 +185,7 @@ public class WaveformViewer implements IWaveformViewer  {
 	            gc.setAlpha(128);
 	            int minX = Math.min(start.x, end.x);
 	            int width = Math.max(start.x, end.x) - minX;
-	            Point origin = waveformCanvas.getOrigin();
-	            int y_top = waveformCanvas.getRulerHeight()- origin.y;
+	            int y_top = waveformCanvas.getRulerHeight();
 	            int y_bottom = waveformCanvas.getSize().y;
 	            gc.fillRectangle(minX, y_top, width,y_bottom);
 			}
@@ -288,7 +287,7 @@ public class WaveformViewer implements IWaveformViewer  {
 	};
 	protected WaveformMouseListener waveformMouseListener = new WaveformMouseListener();
 
-	public WaveformViewer(Composite parent) {
+	public WaveformView(Composite parent) {
 		pcs=new PropertyChangeSupport(this);
 
 		trackVerticalOffset = new TreeMap<Integer, TrackEntry>();
@@ -755,7 +754,7 @@ public class WaveformViewer implements IWaveformViewer  {
 	@Override
 	public void moveSelection(GotoDirection direction, RelationType relationType) {
 		if (currentWaveformSelection!=null && currentWaveformSelection.isStream() && currentTxSelection!=null) {
-			if(relationType.equals(IWaveformViewer.NEXT_PREV_IN_STREAM)){
+			if(relationType.equals(IWaveformView.NEXT_PREV_IN_STREAM)){
 				ITxStream<? extends ITxEvent> stream = currentWaveformSelection.getStream();
 				ITx transaction = null;
 				if (direction == GotoDirection.NEXT) {
diff --git a/plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformViewer.java b/plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformView.java
similarity index 97%
rename from plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformViewer.java
rename to plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformView.java
index 77ced9b..2d8e85b 100644
--- a/plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformViewer.java
+++ b/plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformView.java
@@ -25,7 +25,7 @@ import org.eclipse.swt.widgets.Control;
 import com.minres.scviewer.database.IWaveform;
 import com.minres.scviewer.database.RelationType;
 
-public interface IWaveformViewer extends PropertyChangeListener, ISelectionProvider{
+public interface IWaveformView extends PropertyChangeListener, ISelectionProvider{
 
 	String CURSOR_PROPERTY = "cursor_time";
 	
diff --git a/plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformViewerFactory.java b/plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformViewFactory.java
similarity index 86%
rename from plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformViewerFactory.java
rename to plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformViewFactory.java
index 9db3a8b..79179e1 100644
--- a/plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformViewerFactory.java
+++ b/plugins/com.minres.scviewer.database.ui/src/com/minres/scviewer/database/ui/IWaveformViewFactory.java
@@ -12,6 +12,6 @@ package com.minres.scviewer.database.ui;
 
 import org.eclipse.swt.widgets.Composite;
 
-public interface IWaveformViewerFactory {
-	public IWaveformViewer createPanel(Composite parent);
+public interface IWaveformViewFactory {
+	public IWaveformView createPanel(Composite parent);
 }
diff --git a/plugins/com.minres.scviewer.e4.application/src/com/minres/scviewer/e4/application/parts/WaveformViewer.java b/plugins/com.minres.scviewer.e4.application/src/com/minres/scviewer/e4/application/parts/WaveformViewer.java
index e1cde69..193a29d 100644
--- a/plugins/com.minres.scviewer.e4.application/src/com/minres/scviewer/e4/application/parts/WaveformViewer.java
+++ b/plugins/com.minres.scviewer.e4.application/src/com/minres/scviewer/e4/application/parts/WaveformViewer.java
@@ -93,10 +93,10 @@ import com.minres.scviewer.database.RelationType;
 import com.minres.scviewer.database.swt.Constants;
 import com.minres.scviewer.database.swt.ToolTipContentProvider;
 import com.minres.scviewer.database.swt.ToolTipHelpTextProvider;
-import com.minres.scviewer.database.swt.WaveformViewerFactory;
+import com.minres.scviewer.database.swt.WaveformViewFactory;
 import com.minres.scviewer.database.ui.GotoDirection;
 import com.minres.scviewer.database.ui.ICursor;
-import com.minres.scviewer.database.ui.IWaveformViewer;
+import com.minres.scviewer.database.ui.IWaveformView;
 import com.minres.scviewer.database.ui.TrackEntry;
 import com.minres.scviewer.database.ui.TrackEntry.ValueDisplay;
 import com.minres.scviewer.database.ui.TrackEntry.WaveDisplay;
@@ -164,10 +164,10 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 	private static int disposeListenerNumber = 0;
 	
 	/** The factory. */
-	WaveformViewerFactory factory = new WaveformViewerFactory();
+	WaveformViewFactory factory = new WaveformViewFactory();
 
 	/** The waveform pane. */
-	private IWaveformViewer waveformPane;
+	private IWaveformView waveformPane;
 
 	/** get UISynchronize injected as field */
 	@Inject UISynchronize sync;
@@ -217,7 +217,7 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 	private Object detailsSettings;
 
 	/** The navigation relation type. */
-	private RelationType navigationRelationType=IWaveformViewer.NEXT_PREV_IN_STREAM ;
+	private RelationType navigationRelationType=IWaveformView.NEXT_PREV_IN_STREAM ;
 
 	/** The file monitor. */
 	FileMonitor fileMonitor = new FileMonitor();
@@ -262,7 +262,7 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 		//set selection to empty selection when opening a new waveformPane
 		selectionService.setSelection(new StructuredSelection());
 		
-		waveformPane.addPropertyChangeListener(IWaveformViewer.CURSOR_PROPERTY, new PropertyChangeListener() {
+		waveformPane.addPropertyChangeListener(IWaveformView.CURSOR_PROPERTY, new PropertyChangeListener() {
 			@Override
 			public void propertyChange(PropertyChangeEvent evt) {
 				Long time = (Long) evt.getNewValue();
@@ -272,7 +272,7 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 
 			}
 		});
-		waveformPane.addPropertyChangeListener(IWaveformViewer.MARKER_PROPERTY, new PropertyChangeListener() {
+		waveformPane.addPropertyChangeListener(IWaveformView.MARKER_PROPERTY, new PropertyChangeListener() {
 			@Override
 			public void propertyChange(PropertyChangeEvent evt) {
 				Long time = (Long) evt.getNewValue();
@@ -1215,7 +1215,7 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 	 */
 	public List<RelationType> getAllRelationTypes() {
 		List<RelationType> res =new ArrayList<>();
-		res.add(IWaveformViewer.NEXT_PREV_IN_STREAM);
+		res.add(IWaveformView.NEXT_PREV_IN_STREAM);
 		res.addAll(database.getAllRelationTypes());
 		return res;
 	}
@@ -1227,7 +1227,7 @@ public class WaveformViewer implements IFileChangeListener, IPreferenceChangeLis
 	 */
 	public List<RelationType> getSelectionRelationTypes() {
 		List<RelationType> res =new ArrayList<>();
-		res.add(IWaveformViewer.NEXT_PREV_IN_STREAM);
+		res.add(IWaveformView.NEXT_PREV_IN_STREAM);
 		ISelection selection = waveformPane.getSelection();
 		if(selection instanceof IStructuredSelection && !selection.isEmpty()){
 			IStructuredSelection sel=(IStructuredSelection) selection;
diff --git a/plugins/com.minres.scviewer.ui/src/com/minres/scviewer/ui/TxEditorPart.java b/plugins/com.minres.scviewer.ui/src/com/minres/scviewer/ui/TxEditorPart.java
index f2ae55c..4fb6c91 100644
--- a/plugins/com.minres.scviewer.ui/src/com/minres/scviewer/ui/TxEditorPart.java
+++ b/plugins/com.minres.scviewer.ui/src/com/minres/scviewer/ui/TxEditorPart.java
@@ -48,9 +48,9 @@ import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage;
 import com.minres.scviewer.database.IWaveform;
 import com.minres.scviewer.database.IWaveformDb;
 import com.minres.scviewer.database.IWaveformDbFactory;
-import com.minres.scviewer.database.swt.WaveformViewerFactory;
+import com.minres.scviewer.database.swt.WaveformViewFactory;
 import com.minres.scviewer.database.ui.GotoDirection;
-import com.minres.scviewer.database.ui.IWaveformViewer;
+import com.minres.scviewer.database.ui.IWaveformView;
 import com.minres.scviewer.database.ui.TrackEntry;
 import com.minres.scviewer.ui.views.TxOutlinePage;
 
@@ -78,7 +78,7 @@ public class TxEditorPart extends EditorPart implements ITabbedPropertySheetPage
 
 	public static final String WAVE_ACTION_ID = "com.minres.scviewer.ui.action.AddToWave";
 
-	private IWaveformViewer txDisplay;
+	private IWaveformView txDisplay;
 
 	/** This is the root of the editor's model. */
 	private IWaveformDb database;
@@ -112,10 +112,10 @@ public class TxEditorPart extends EditorPart implements ITabbedPropertySheetPage
 				}		
 			}
 		});
-		WaveformViewerFactory factory = new WaveformViewerFactory();
+		WaveformViewFactory factory = new WaveformViewFactory();
 		txDisplay = factory.createPanel(parent);
 		txDisplay.setMaxTime(0);
-		txDisplay.addPropertyChangeListener(IWaveformViewer.CURSOR_PROPERTY, new PropertyChangeListener() {
+		txDisplay.addPropertyChangeListener(IWaveformView.CURSOR_PROPERTY, new PropertyChangeListener() {
             @Override
             public void propertyChange(PropertyChangeEvent evt) {
                 Long time = (Long) evt.getNewValue();