diff --git a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/Constants.java b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/Constants.java
index 7e8563f..38cd838 100644
--- a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/Constants.java
+++ b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/Constants.java
@@ -1,5 +1,7 @@
 package com.minres.scviewer.database.ui.swt;
 
+import java.text.DecimalFormat;
+
 public class Constants {
 
 	public static final String[] UNIT_STRING={"fs", "ps", "ns", "us", "ms"};//, "s"};
@@ -9,6 +11,20 @@ public class Constants {
 	public static final String CONTENT_PROVIDER_TAG = "TOOLTIP_CONTENT_PROVIDER";
 	public static final String HELP_PROVIDER_TAG = "TOOLTIP_HELP_PROVIDER";
 	
+	public static final DecimalFormat TIME_FORMAT_FS = new DecimalFormat("#"); 
+	public static final DecimalFormat TIME_FORMAT_PS = new DecimalFormat("#"); 
+	public static final DecimalFormat TIME_FORMAT_NS = new DecimalFormat("#.0##"); 
+	public static final DecimalFormat TIME_FORMAT_US = new DecimalFormat("#.0#####"); 
+	public static final DecimalFormat TIME_FORMAT_MS = new DecimalFormat("#.0#####"); 
+	
+	public static final DecimalFormat[] TIME_FORMAT = {
+			TIME_FORMAT_FS, TIME_FORMAT_FS, TIME_FORMAT_FS, TIME_FORMAT_FS, TIME_FORMAT_FS, TIME_FORMAT_FS,
+			TIME_FORMAT_PS, TIME_FORMAT_PS, TIME_FORMAT_PS, TIME_FORMAT_PS, TIME_FORMAT_PS, TIME_FORMAT_PS,
+			TIME_FORMAT_NS, TIME_FORMAT_NS, TIME_FORMAT_NS, TIME_FORMAT_NS, TIME_FORMAT_NS, TIME_FORMAT_NS,
+			TIME_FORMAT_US, TIME_FORMAT_US, TIME_FORMAT_US, TIME_FORMAT_US, TIME_FORMAT_US, TIME_FORMAT_US,
+			TIME_FORMAT_MS, TIME_FORMAT_MS, TIME_FORMAT_MS, TIME_FORMAT_MS, TIME_FORMAT_MS, TIME_FORMAT_MS,
+	};
+
 	private Constants() {}
 
 }
diff --git a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/CursorPainter.java b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/CursorPainter.java
index 09e0777..9ae501a 100644
--- a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/CursorPainter.java
+++ b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/CursorPainter.java
@@ -15,6 +15,7 @@ import org.eclipse.swt.graphics.Rectangle;
 
 import com.minres.scviewer.database.ui.ICursor;
 import com.minres.scviewer.database.ui.WaveformColors;
+import com.minres.scviewer.database.ui.swt.Constants;
 
 public class CursorPainter implements IPainter, ICursor {
 
@@ -84,7 +85,7 @@ public class CursorPainter implements IPainter, ICursor {
 				proj.setBackground(drawColor);
 				proj.setForeground(textColor);
 				double dTime=time;
-				proj.drawText((dTime/waveCanvas.getScaleFactorPow10())+waveCanvas.getUnitStr(), x+1, top);
+				proj.drawText(Constants.TIME_FORMAT[waveCanvas.getZoomLevel()].format(dTime/waveCanvas.getScaleFactorPow10())+waveCanvas.getUnitStr(), x+1, top);
 			}
 		}
 	}	
diff --git a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/RulerPainter.java b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/RulerPainter.java
index 275ed94..98a11b6 100644
--- a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/RulerPainter.java
+++ b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/RulerPainter.java
@@ -18,14 +18,14 @@ import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.wb.swt.SWTResourceManager;
 
+import com.minres.scviewer.database.ui.swt.Constants;
+
 public class RulerPainter implements IPainter {
     protected final WaveformCanvas waveCanvas;
     
     static final int RULER_TICK_MINOR = 10;
     static final int RULER_TICK_MAJOR = 100;
        
-	static final DecimalFormat df = new DecimalFormat("#.00####"); 
-
     public RulerPainter(WaveformCanvas waveCanvas) {
         this.waveCanvas=waveCanvas;
     }
@@ -52,7 +52,7 @@ public class RulerPainter implements IPainter {
 
         int minorTickY = waveCanvas.rulerHeight-5;
         int majorTickY = waveCanvas.rulerHeight-15;
-        int textY=waveCanvas.rulerHeight-20;
+        int textY=waveCanvas.rulerHeight-30;
         int baselineY=waveCanvas.rulerHeight - 1;
         int bottom=waveCanvas.rulerHeight - 2;
 
@@ -66,13 +66,22 @@ public class RulerPainter implements IPainter {
         gc.fillRectangle(new Rectangle(area.x, area.y, area.width, baselineY));
         gc.setForeground(headerFgColor);
         gc.drawLine(area.x, area.y+bottom, area.x+area.width, area.y+bottom);
-        
+        boolean allMarker=true;
+        for (long pos = startMinorIncrPos, tick = startMinorIncrVal; pos < endPos; pos+= rulerTickMinor, tick += rulerTickMinor) {
+            if ((tick % rulerTickMajor) == 0) {
+            	String text = Constants.TIME_FORMAT[waveCanvas.getZoomLevel()].format(tick/scaleFactor*unitMultiplier);
+            	if(text.length()>8) allMarker=false;
+            }
+        }
+        boolean drawText = true;
         for (long pos = startMinorIncrPos, tick = startMinorIncrVal; pos < endPos; pos+= rulerTickMinor, tick += rulerTickMinor) {
             int x0Pos = (int) (pos/scaleFactor);
             long x0Val = tick/scaleFactor;
             if ((tick % rulerTickMajor) == 0) {
-                gc.drawText(df.format(x0Val*unitMultiplier)+unit, x0Pos, area.y+textY);
+            	if(allMarker || drawText)
+            		gc.drawText(Constants.TIME_FORMAT[waveCanvas.getZoomLevel()].format(x0Val*unitMultiplier)+unit, x0Pos, area.y+textY);
                 gc.drawLine(x0Pos, area.y+majorTickY, x0Pos,area.y+ bottom);
+                drawText=!drawText;
             } else {
                 gc.drawLine(x0Pos, area.y+minorTickY, x0Pos, area.y+bottom);
             }
diff --git a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/WaveformView.java b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/WaveformView.java
index d4cf7cd..e9d563f 100644
--- a/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/WaveformView.java
+++ b/plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/swt/internal/WaveformView.java
@@ -99,8 +99,6 @@ public class WaveformView implements IWaveformView {
 
 	private PropertyChangeSupport pcs;
 
-	static final DecimalFormat df = new DecimalFormat("#0.00####");
-
 	private ITx currentTxSelection;
 
 	private ArrayList<TrackEntry> currentWaveformSelection = new ArrayList<>();
@@ -1477,7 +1475,7 @@ public class WaveformView implements IWaveformView {
 		StringBuilder sb = new StringBuilder();
 		double dTime = time;
 		double scaledTime = dTime / waveformCanvas.getScaleFactorPow10();
-		return sb.append(df.format(scaledTime)).append(waveformCanvas.getUnitStr()).toString();
+		return sb.append(Constants.TIME_FORMAT[waveformCanvas.getZoomLevel()].format(scaledTime)).append(waveformCanvas.getUnitStr()).toString();
 	}
 
 	/*