dler.ArrowKeyFactor:        -1.0
   OpenGL.EventHandler.MouseDragFactor:       -1.0
   OpenGL.EventHandler.MouseWheelFactor:      -1.0
</pre>
</li>

<li>Add camera auto-rotation support. Controls are available from the
  "Extras" tab of <tt>TGLViewer</tt> GUI editor. Implemented in class
  <tt>TGLAutoRotator</tt>, can be sub-classed and attached to a viewer via
  <tt>TGLViewer::SetAutoRotator()</tt> method.</li>

<li>Added new overlay element class <tt>TGLCameraGuide</tt> that shows the
orientation of major