diff --git a/debug/org.eclipse.cdt.debug.ui/ChangeLog b/debug/org.eclipse.cdt.debug.ui/ChangeLog
index 18f14aa7cd1..d1632b4c9b2 100644
--- a/debug/org.eclipse.cdt.debug.ui/ChangeLog
+++ b/debug/org.eclipse.cdt.debug.ui/ChangeLog
@@ -1,3 +1,9 @@
+2002-10-24 Mikhail Khodjaiants
+	Implementation of the 'Number Of Columns' action.
+	* MemoryNumberOfColumnAction.java: the action class
+	* MemoryViewer.java: support of the action
+	* MemoryView.java: support of the action
+
 2002-10-25 Mikhail Khodjaiants
 	Replaced the usage of 'setWordSize' method by the 'reformat' method of 'IFormattedMemoryBlock'.
 	* MemorySizeAction.java
diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/actions/MemoryNumberOfColumnAction.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/actions/MemoryNumberOfColumnAction.java
new file mode 100644
index 00000000000..442b3642ff5
--- /dev/null
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/actions/MemoryNumberOfColumnAction.java
@@ -0,0 +1,76 @@
+/*
+ *(c) Copyright QNX Software Systems Ltd. 2002.
+ * All Rights Reserved.
+ * 
+ */
+package org.eclipse.cdt.debug.internal.ui.actions;
+
+import org.eclipse.cdt.debug.internal.ui.actions.MemoryActionSelectionGroup;
+import org.eclipse.cdt.debug.internal.ui.views.memory.MemoryViewer;
+import org.eclipse.cdt.debug.ui.CDebugUIPlugin;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.debug.core.DebugException;
+import org.eclipse.jface.action.Action;
+import org.eclipse.ui.texteditor.IUpdate;
+
+/**
+ * Enter type comment.
+ * 
+ * @since: Oct 25, 2002
+ */
+public class MemoryNumberOfColumnAction extends Action implements IUpdate
+{
+	private MemoryActionSelectionGroup fGroup;
+	private MemoryViewer fMemoryViewer;
+	private int fNumberOfColumns = 0;
+
+	/**
+	 * Constructor for MemoryNumberOfColumnAction.
+	 */
+	public MemoryNumberOfColumnAction( MemoryActionSelectionGroup group, 
+							 		   MemoryViewer viewer, 
+							 		   int numberOfColumns )
+	{
+		super( getLabel( numberOfColumns ) );
+		fGroup = group;
+		fMemoryViewer = viewer;
+		fNumberOfColumns = numberOfColumns;
+		setChecked( false );
+	}
+
+	private static String getLabel( int numberOfColumns )
+	{
+		return Integer.toString( numberOfColumns) + " column" + ( ( numberOfColumns > 1 ) ? "s" : "" );
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.ui.texteditor.IUpdate#update()
+	 */
+	public void update()
+	{
+		setEnabled( fMemoryViewer.canUpdate() );
+		setChecked( fMemoryViewer.getCurrentNumberOfColumns() == fNumberOfColumns );
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.jface.action.IAction#run()
+	 */
+	public void run()
+	{
+		try
+		{
+			fMemoryViewer.setNumberOfColumns( fNumberOfColumns );
+			fGroup.setCurrentSelection( this );
+		}
+		catch( DebugException e )
+		{
+			CDebugUIPlugin.errorDialog( e.getMessage(), (IStatus)null );
+			setChecked( false );
+		}
+	}
+	
+	public String getActionId()
+	{
+		return "MemoryNumberOfColumns" + fNumberOfColumns;
+	}
+}
diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryView.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryView.java
index aed8d5bc28f..3f42aa74f07 100644
--- a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryView.java
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryView.java
@@ -11,6 +11,7 @@ import org.eclipse.cdt.debug.internal.ui.ICDebugHelpContextIds;
 import org.eclipse.cdt.debug.internal.ui.actions.AutoRefreshMemoryAction;
 import org.eclipse.cdt.debug.internal.ui.actions.ClearMemoryAction;
 import org.eclipse.cdt.debug.internal.ui.actions.MemoryActionSelectionGroup;
+import org.eclipse.cdt.debug.internal.ui.actions.MemoryNumberOfColumnAction;
 import org.eclipse.cdt.debug.internal.ui.actions.MemorySizeAction;
 import org.eclipse.cdt.debug.internal.ui.actions.RefreshMemoryAction;
 import org.eclipse.cdt.debug.internal.ui.actions.ShowAsciiAction;
@@ -56,6 +57,7 @@ public class MemoryView extends AbstractDebugEventHandlerView
 {
 	private IDebugModelPresentation fModelPresentation = null;
 	private MemoryActionSelectionGroup fMemorySizeGroup = null;
+	private MemoryActionSelectionGroup fMemoryNumberOfColumnsGroup = null;
 
 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.ui.AbstractDebugView#createViewer(Composite)
@@ -103,6 +105,9 @@ public class MemoryView extends AbstractDebugEventHandlerView
 		fMemorySizeGroup = new MemoryActionSelectionGroup();
 		createSizeActionGroup( fMemorySizeGroup );
 
+		fMemoryNumberOfColumnsGroup = new MemoryActionSelectionGroup();
+		createNumberOfColumnsActionGroup( fMemoryNumberOfColumnsGroup );
+
 		// set initial content here, as viewer has to be set
 		setInitialContent();
 	}
@@ -145,6 +150,16 @@ public class MemoryView extends AbstractDebugEventHandlerView
 		}
 		menu.appendToGroup( ICDebugUIConstants.FORMAT_GROUP, subMenu );
 
+		subMenu = new MenuManager( "Number Of Columns" );
+		{
+			IAction[] actions = fMemoryNumberOfColumnsGroup.getActions();
+			for ( int i = 0; i < actions.length; ++i )
+			{
+				subMenu.add( actions[i] );
+			}
+		}
+		menu.appendToGroup( ICDebugUIConstants.FORMAT_GROUP, subMenu );
+
 		menu.appendToGroup( IDebugUIConstants.RENDER_GROUP, getAction( "ShowAscii" ) ); //$NON-NLS-1$
 	}
 
@@ -199,6 +214,8 @@ public class MemoryView extends AbstractDebugEventHandlerView
 	{
 		removeActionGroup( fMemorySizeGroup );
 		fMemorySizeGroup.dispose();
+		removeActionGroup( fMemoryNumberOfColumnsGroup );
+		fMemoryNumberOfColumnsGroup.dispose();
 
 		remove( (ShowAsciiAction)getAction( "ShowAscii" ) );
 		remove( (ClearMemoryAction)getAction( "ClearMemory" ) );
@@ -302,6 +319,23 @@ public class MemoryView extends AbstractDebugEventHandlerView
 		}
 	}
 	
+	private void createNumberOfColumnsActionGroup( MemoryActionSelectionGroup group )
+	{
+		int[] nocs = new int[] { IFormattedMemoryBlock.MEMORY_NUMBER_OF_COLUMNS_1,
+								 IFormattedMemoryBlock.MEMORY_NUMBER_OF_COLUMNS_2, 
+								 IFormattedMemoryBlock.MEMORY_NUMBER_OF_COLUMNS_4, 
+								 IFormattedMemoryBlock.MEMORY_NUMBER_OF_COLUMNS_8, 
+								 IFormattedMemoryBlock.MEMORY_NUMBER_OF_COLUMNS_16 }; 
+		for ( int i = 0; i < nocs.length; ++i )
+		{
+			MemoryNumberOfColumnAction action = new MemoryNumberOfColumnAction( group, (MemoryViewer)getViewer(), nocs[i] );
+			action.setEnabled( false );
+			setAction( action.getActionId(), action ); //$NON-NLS-1$
+			add( action );
+			group.addAction( action );
+		}
+	}
+	
 	private void removeActionGroup(  MemoryActionSelectionGroup group )
 	{
 		IAction[] actions = group.getActions();
diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryViewer.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryViewer.java
index 5ab72e1a526..cf4d7b3ada2 100644
--- a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryViewer.java
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/views/memory/MemoryViewer.java
@@ -226,4 +226,20 @@ public class MemoryViewer extends ContentViewer
 			((MemoryControlArea)fTabFolder.getSelection().getControl()).refresh();
 		}
 	}
+	
+	public int getCurrentNumberOfColumns()
+	{
+		IFormattedMemoryBlock block = ((MemoryControlArea)fTabFolder.getSelection().getControl()).getMemoryBlock();
+		return ( block != null ) ? block.getNumberOfColumns() : 0;
+	}
+	
+	public void setNumberOfColumns( int numberOfColumns ) throws DebugException
+	{
+		IFormattedMemoryBlock block = ((MemoryControlArea)fTabFolder.getSelection().getControl()).getMemoryBlock();
+		if ( block != null )
+		{ 
+			block.reformat( block.getFormat(), block.getWordSize(), block.getNumberOfRows(), numberOfColumns );
+			((MemoryControlArea)fTabFolder.getSelection().getControl()).refresh();
+		}
+	}
 }