diff --git a/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlot.java b/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlot.java
index 0a87abc1e6d53af0ed0157dc65f06aed77c116d4..dd8ad696921f48cae69f55ca5300699e4d86e594 100644
--- a/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlot.java
+++ b/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlot.java
@@ -50,6 +50,7 @@ public class PlotSlot extends JPanel{
     private PlotPanel itsPlot;
     private String slotLabel;
     private boolean hasLegend;
+    private boolean isViewedExternally;
     private JLabel rightClickFacade;
     private LinkedList<PlotSlotListener> listenerList =  null;
     private MouseAdapter plotMouseListener;
@@ -92,6 +93,13 @@ public class PlotSlot extends JPanel{
     public String getLabel(){
         return slotLabel;
     }
+    protected void setViewedExternally(boolean viewedExternally){
+       this.isViewedExternally = viewedExternally;
+    }
+    
+    protected boolean isViewedExternally(){
+        return isViewedExternally;
+    }
     public PlotPanel getPlot(){
         return itsPlot;
     }
diff --git a/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlotViewFrame.java b/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlotViewFrame.java
index 20773049153a2edc62f498082be229c059860e9c..79eef7b4411ae1927c81875ced965c424066d864 100644
--- a/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlotViewFrame.java
+++ b/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlotViewFrame.java
@@ -34,7 +34,7 @@ import nl.astron.lofar.java.gui.plotter.exceptions.PlotterException;
  */
 public class PlotSlotViewFrame extends JDialog{
     
-    int plotIndex;
+    protected int plotIndex;
     
     /** Creates a new instance of PlotSlotViewFrame */
     public PlotSlotViewFrame(PlotSlotManager parent, int index, String title, boolean showLegendOnly) {
diff --git a/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlotsPanel.java b/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlotsPanel.java
index 9239c15d8a3a7b90ea7c518c8c1b2723a1954fe6..146b80183ed93e490495fde4a7dfe127c9a80297 100644
--- a/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlotsPanel.java
+++ b/SAS/OTB/OTB/src/nl/astron/lofar/sas/otb/util/plotter/PlotSlotsPanel.java
@@ -23,6 +23,8 @@
 
 package nl.astron.lofar.sas.otb.util.plotter;
 
+import java.awt.BorderLayout;
+import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.GridBagConstraints;
 import java.awt.GridBagLayout;
@@ -31,10 +33,10 @@ import java.awt.event.ActionListener;
 import java.awt.event.MouseEvent;
 import java.awt.event.WindowEvent;
 import java.awt.event.WindowListener;
-import javax.swing.JComponent;
+import javax.swing.JLabel;
 import javax.swing.JMenu;
 import javax.swing.JMenuItem;
-import javax.swing.JOptionPane;
+import javax.swing.JPanel;
 import javax.swing.JPopupMenu;
 import org.apache.log4j.Logger;
 
@@ -139,12 +141,32 @@ public class PlotSlotsPanel extends javax.swing.JPanel {
             gridBagConstraints.weighty = 1.0;
             gridBagConstraints.anchor = java.awt.GridBagConstraints.CENTER;
             PlotSlot newSlot = itsSlotManager.getSlot(i);
-            newSlot.addSlotListener(new SlotMouseAdapter());
-            //newSlot.setSize(new Dimension(getWidth()/columnsAndRows,getHeight()/columnsAndRows));
-            //
-            newSlot.setMinimumSize(new Dimension(getWidth()/columnsAndRows,getHeight()/columnsAndRows));
-            newSlot.setPreferredSize(new Dimension(getWidth()/columnsAndRows,getHeight()/columnsAndRows));
-            slotsPanel.add(newSlot,gridBagConstraints);
+            if(!newSlot.isViewedExternally()){
+                newSlot.addSlotListener(new SlotMouseAdapter());
+                //newSlot.setSize(new Dimension(getWidth()/columnsAndRows,getHeight()/columnsAndRows));
+                //
+                newSlot.setMinimumSize(new Dimension(getWidth()/columnsAndRows,getHeight()/columnsAndRows));
+                newSlot.setPreferredSize(new Dimension(getWidth()/columnsAndRows,getHeight()/columnsAndRows));
+                slotsPanel.add(newSlot,gridBagConstraints);
+            }else{
+                JPanel tempPanel = new JPanel();
+                tempPanel.setBackground(Color.WHITE);
+                tempPanel.setLayout(new BorderLayout());
+                tempPanel.setBorder(javax.swing.BorderFactory.createEtchedBorder());
+                tempPanel.setMinimumSize(new Dimension(getWidth()/columnsAndRows,getHeight()/columnsAndRows));
+                tempPanel.setPreferredSize(new Dimension(getWidth()/columnsAndRows,getHeight()/columnsAndRows));
+                tempPanel.add(new JLabel("External viewer active"),BorderLayout.CENTER);
+                JPanel northPanel = new JPanel();
+                northPanel.setLayout(new BorderLayout());
+                northPanel.setBackground(Color.LIGHT_GRAY);
+                JLabel slotNumber = new JLabel(""+i);
+                slotNumber.setForeground(Color.WHITE);
+                northPanel.add(slotNumber,BorderLayout.CENTER);
+                tempPanel.add(northPanel,BorderLayout.NORTH);
+                
+                slotsPanel.add(tempPanel,gridBagConstraints);
+            }
+            
             x++;
             if (x == columnsAndRows){
                 y++;
@@ -267,12 +289,12 @@ public class PlotSlotsPanel extends javax.swing.JPanel {
                                 dialog.addWindowListener(new WindowListener(){
                                     public void windowDeactivated(WindowEvent e){}
                                     public void windowActivated(WindowEvent e){}
-                                    public void windowClosed(WindowEvent e){
-                                        rearrangeSlotGrid();
-                                        externalLegendActive = false;}
+                                    public void windowClosed(WindowEvent e){}
                                     public void windowDeiconified(WindowEvent e){}
                                     public void windowIconified(WindowEvent e){}
-                                    public void windowClosing(WindowEvent e){}
+                                    public void windowClosing(WindowEvent e){
+                                        externalLegendActive = false;
+                                    }
                                     public void windowOpened(WindowEvent e){}
                                 });
                                 dialog.setVisible(true);
@@ -329,10 +351,15 @@ public class PlotSlotsPanel extends javax.swing.JPanel {
                                 PlotSlotViewFrame dialog = new PlotSlotViewFrame(itsSlotManager,Integer.parseInt(selectedSlot.getLabel()),"Viewer for Plot "+selectedSlot.getLabel(),false);
                                 dialog.addWindowListener(new WindowListener(){
                                     public void windowDeactivated(WindowEvent e){}
-                                    public void windowActivated(WindowEvent e){}
+                                    public void windowActivated(WindowEvent e){
+                                        PlotSlotViewFrame sourceFrame = (PlotSlotViewFrame)e.getSource();
+                                        itsSlotManager.getSlot(sourceFrame.plotIndex).setViewedExternally(true);
+                                        rearrangeSlotGrid();}
                                     public void windowClosed(WindowEvent e){
+                                        PlotSlotViewFrame sourceFrame = (PlotSlotViewFrame)e.getSource();
+                                        itsSlotManager.getSlot(sourceFrame.plotIndex).setViewedExternally(false);
                                         rearrangeSlotGrid();
-                                        externalViewerActive = false;}
+                                        externalLegendActive = false;}
                                     public void windowDeiconified(WindowEvent e){}
                                     public void windowIconified(WindowEvent e){}
                                     public void windowClosing(WindowEvent e){}