m_matrixPanel = null;
  protected void appearanceDesign() {    removeAll();    m_visual =       new BeanVisual("ScatterPlotMatrix", 		     BeanVisual.ICON_PATH+"ScatterPlotMatrix.gif",		     BeanVisual.ICON_PATH+"ScatterPlotMatrix_animated.gif");    setLayout(new BorderLayout());    add(m_visual, BorderLayout.CENTER);  }