RGMAP /GREY

        [GREG2\]RGMAP /GREY [start [step] [background]]

    On graphic displays with area filling capabilities, fills contours  with
    up to 16 different color pens (but the number of contours is not limited
    to 16). These pen colors may be changed in the same manner  as  for  the
    pixels  colors  (see  HELP  LUT /PEN).   "start"  (default 0) and "step"
    (default 1) may be used to change the exploration of the 16-pen palette.
    "background"  is  the  number  of  a  color  used to fill the map before
    contour-filling,  thus  providing  a  user-defined  background  for  the
    contour-filled map.

    In case of Filling problems, see the  subtopic  MEMORY_OPTIONS  of  this
    HELP.