diff --git a/src/org/hwo/ui/JDiagram.java b/src/org/hwo/ui/JDiagram.java
index ee5e485..ec7d737 100644
--- a/src/org/hwo/ui/JDiagram.java
+++ b/src/org/hwo/ui/JDiagram.java
@@ -27,6 +27,7 @@ import javax.swing.JPanel;
 import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
 
+import org.hwo.ui.diagram.CirclePlotPainter;
 import org.hwo.ui.diagram.DiagramListener;
 import org.hwo.ui.diagram.DiagramViewEvent;
 import org.hwo.ui.diagram.LinePlotPainter;
@@ -111,6 +112,10 @@ public class JDiagram extends JComponent implements PlotProviderListener, Bounde
 	private Point 		mousePos;
 	
 	private double		mouseWheelZoom = 1.03;
+	
+	private double 		abzissSpacing;
+	private boolean		pointsEnabled;
+	
 			
 	public JDiagram(){
 		setMinimumSize(new Dimension(80, 80));
@@ -119,7 +124,8 @@ public class JDiagram extends JComponent implements PlotProviderListener, Bounde
 		defaultLabeler = new SimplePlotLabeler();
 		abszissLabeler = defaultLabeler;
 		
-		bTop = bBottom = bLeft = 10;
+		bTop = 40; 
+		bBottom = bLeft = 10;
 		bRight = 30;
 		axMarkerLength = 3;
 		
@@ -258,6 +264,8 @@ public class JDiagram extends JComponent implements PlotProviderListener, Bounde
 				
 			}
 		});
+		
+		this.abzissSpacing = 1.2;
 	}
 	
 	private void fireViewWindowChanged(){
@@ -324,7 +332,7 @@ public class JDiagram extends JComponent implements PlotProviderListener, Bounde
 			for (int n=0; n < plotProvider.getMaxOrdinate() + 1; n++)
 				ordinateViews[n] = new OrdinateView(n);
 			
-			PlotPainter pp = new LinePlotPainter();
+			PlotPainter pp = new CirclePlotPainter();
 			plotPainters = new PlotPainter[plotProvider.getNumGraphs()];
 			for (int n=0;n<plotProvider.getNumGraphs();n++)
 				plotPainters[n] = pp;
@@ -402,6 +410,12 @@ public class JDiagram extends JComponent implements PlotProviderListener, Bounde
 		this.abszissLabeler = abszissLabeler;
 	}
 	
+	public double getAbzissSpacing() {
+		return this.abzissSpacing;
+	}
+	public void setAbszissSpacing(double spacing) {
+		this.abzissSpacing = spacing;
+	}
 	
 	public void autoscale(){
 		int ordinate;
@@ -591,7 +605,7 @@ public class JDiagram extends JComponent implements PlotProviderListener, Bounde
 		
 		if (nMarker == 0){
 			int w = g.getFontMetrics().stringWidth( labeler.getAbzisseLabel(this, (double)this.plotProvider.getPositionMaximum()));
-			nMarker = plotWidth / (w*8/7);
+			nMarker = plotWidth / (int)(w*this.abzissSpacing);
 		}
 		
 		// TODO change for zoom
@@ -623,7 +637,7 @@ public class JDiagram extends JComponent implements PlotProviderListener, Bounde
 					getWidth() - bRight - plotWidth + xpos,
 					bTop + plotHeight + axMarkerLength
 					);
-
+			
 			if (drawVerticalGrid){
 				g.setColor(verticalGridColor);
 				g.drawLine(
@@ -663,7 +677,7 @@ public class JDiagram extends JComponent implements PlotProviderListener, Bounde
 			for (int n=0;n<this.plotProvider.getLength(); n++){				
 				int x,y;
 				Float value		= this.plotProvider.getValue(n, graph);
-				Float position	= this.plotProvider.getPosition(n, graph);
+				Double position	= this.plotProvider.getPosition(n, graph);
 				
 				if ((value != null) && (position != null) && (position >= this.abszissMinimum) && (position <= amax))
 				{
diff --git a/src/org/hwo/ui/diagram/AnnotatedPlotProvider.java b/src/org/hwo/ui/diagram/AnnotatedPlotProvider.java
index 911a334..e11fd4c 100644
--- a/src/org/hwo/ui/diagram/AnnotatedPlotProvider.java
+++ b/src/org/hwo/ui/diagram/AnnotatedPlotProvider.java
@@ -291,18 +291,18 @@ public class AnnotatedPlotProvider implements PlotProvider2{
 	}
 
 	@Override
-	public Float getPosition(int x, int graph) {
-		return (float)x;
+	public Double getPosition(int x, int graph) {
+		return (double)x;
 	}
 
 	@Override
-	public Float getPositionMinimum() {
-		return 0.0f;
+	public Double getPositionMinimum() {
+		return 0.0;
 	}
 
 	@Override
-	public Float getPositionMaximum() {
-		return this.values.size()-1.0f;
+	public Double getPositionMaximum() {
+		return this.values.size()-1.0;
 	}
 	
 	private LinkedList<PlotProviderListener> plotProviderListeners = new LinkedList<PlotProviderListener>();
diff --git a/src/org/hwo/ui/diagram/PlotProvider2.java b/src/org/hwo/ui/diagram/PlotProvider2.java
index 223db9f..9d022ce 100644
--- a/src/org/hwo/ui/diagram/PlotProvider2.java
+++ b/src/org/hwo/ui/diagram/PlotProvider2.java
@@ -9,11 +9,11 @@ public interface PlotProvider2 {
 	public int getNumGraphs();
 	public String getLabel(int graph);
 	public Float getValue(int x,int graph);
-	public Float getPosition(int x,int graph);
+	public Double getPosition(int x,int graph);
 	public int getOrdinate(int graph);
 	
-	public Float	getPositionMinimum();
-	public Float	getPositionMaximum();
+	public Double	getPositionMinimum();
+	public Double	getPositionMaximum();
 	
 	
 	public Color[] getColors();
diff --git a/src/org/hwo/ui/diagram/SimplePlotProvider.java b/src/org/hwo/ui/diagram/SimplePlotProvider.java
index 8fc0803..6a03134 100644
--- a/src/org/hwo/ui/diagram/SimplePlotProvider.java
+++ b/src/org/hwo/ui/diagram/SimplePlotProvider.java
@@ -83,8 +83,8 @@ public class SimplePlotProvider implements PlotProvider2 {
 	}
 
 	@Override
-	public Float getPosition(int x, int graph) {
-		return (float)x;
+	public Double getPosition(int x, int graph) {
+		return x * 1.0;
 	}
 	
 	@Override
@@ -97,12 +97,12 @@ public class SimplePlotProvider implements PlotProvider2 {
 	}
 	
 	@Override
-	public Float getPositionMaximum() {
-		return (float)(this.points-1);
+	public Double getPositionMaximum() {
+		return (double)(this.points-1);
 	}
 	@Override
-	public Float getPositionMinimum() {
-		return (float)0;
+	public Double getPositionMinimum() {
+		return 0.0;
 	}