Motif - Window Sash
     The Motif Window has a sash.  The sash allows the size
     of the upper and lower window panes to be adjusted
     relative to one another.  The sash is a small square
     button below the upper window pane.  By clicking on
     this button holding and dragging the upper or lower
     window can be dragged to increase its size relative to
     the other pane.  

