Clipping
    Clipping contains controls for clipping the
      view in the X, Y, and Z planes for Surface, Volume, and Features
      structures in Montage,
       Volume,
      All, and Surface
      Views.
      
        - Checkbox toggles turn the clipping
            off/on in each plane and for Surface, Volume, or Features
            structures.
        - The Setup button opens the
            Clipping Planes settings box that contains options for
            panning, rotating, and setting the thickness for the
            clipping box. The Show Clipping Box Outline toggle
            is useful for seeing exactly what will be clipped when
            clipping planes are turned on. 
 
      