nattable.doCommand(new EditCellCommand(parent,getConfigRegistry(), cell));

natTable.addConfiguration(new AbstractHeaderMenuConfiguration(natTable) {
	@Override
	protected PopupMenuBuilder createCornerMenu(NatTable natTable) {
		return super.createCornerMenu(natTable).withMenuItemProvider(new IMenuItemProvider() {
					
			@Override
			public void addMenuItem(final NatTable natTable, Menu popupMenu) {
				MenuItem menuItem = new MenuItem(popupMenu, SWT.PUSH);
				menuItem.setText("Edit Col1/Row1");
				menuItem.setEnabled(true);

				menuItem.addSelectionListener(new SelectionAdapter() {
					@Override
					public void widgetSelected(SelectionEvent event) {
						natTable.doCommand(new EditCellCommand(natTable,
							natTable.getConfigRegistry(),
							natTable.getCellByPosition(1, 1)));
					}
				});
			}
		});
	}
});