GRID

        [GREG2\]GRID [Astep [Dstep]] [/ALTERNATE]

    Plots a  grid  of  meridian  and  parallels  according  to  the  current
    projection  and  system.  Astep is the grid step for meridian in degrees
    (Default 15), Dstep for Parallels (Default Rstep). If  one  step  is  0,
    this  part  of  the  grid  is  not plotted.  If the /ALTERNATE option is
    present, the grid will be a grid  in  the  alternate  coordinate  system
    (Equatorial  or  Galactic).  This does not currently work for projection
    type AITOFF and RADIO.