Tab Functions
     The Tab section of the Toolbar contains controls
      for functions that are active across Viewing
            Tabs. Tab Functions are not active
      in Chart View.
      
    Yoking
      allows one to define groups of tabs or windows that will have
      linked rotation, panning, and zooming. 
    
    
      
    
    
      - Yoking Groups are defined between Surface,
           Montage,
          and All
          Views OR between  Volume
          and All views (yoking is not applied between surfaces and
          volumes). 
      
    
    
      
    
    
      - Surfaces are yoked so that the
          corresponding lateral or medial contralateral hemispheres can
          be viewed at the same time (e.g. superior temporal gyrus on
          the lateral surface can be viewed on the right and left
          hemisphere simultaneously).  
 
    
    