SET BOX_LOCATION

        [GREG1\]SET BOX_LOCATION Argument_List

    Define the position of the box.  The  argument  list  specifies  various
    options for the box position :
      - PORTRAIT     Define a default Portrait oriented box
      - LANDSCAPE    Define a default Landscape oriented box
      - SQUARE       Define a square box
      - MATCH [Gx1 Gy1 [Ratio]]   Define a box which matches  the  ratio  of
        the  physical units. By default, the bottom left corner is placed at
        the default position for the current plot page, but can be moved  by
        specifying arguments Gx1 and Gy1. The box size is adjusted such that
        the box occupies as much space as possible within  the  default  box
        position  for  the  current  plot  page type. Ratio is an additional
        arguments which indicates a scaling factor for the Y axis.
    WARNING : The box is computed from the  current  limits,  and  will  not
        change if you computes new limits
      - Gx1 Gx2 Gy1 Gy2   Defines  the  positions  of  all  box  corners  in
        physical units.
    The default is LANDSCAPE, PORTRAIT or the default VIEWPORT according  to
    the current PLOT_PAGE type.