Motif - Window Panes
     Motif supports multiple panes in a Motif Window.  
     The file manager has two window panes. The
     upper pane is the file window pane and the
     lower pane corresponds to the terminal emulator window.  
     Between consecutive window panes there is a sash which 
     is a small square button. 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.
