WEDGE

        [GREG2\]WEDGE [Top|Bottom|Left|Right [Size]]  [/SCALING  Lin|Log|Equ
    Min Max] [/LEVEL [Label] ]

    Will plot a WEDGE along the current BOX. WEDGES are used  after  a  PLOT
    command to show the relationship between pixel hues and image values.

    The default position is Right, i.e., on the right side of the  box,  but
    the  other location and size modifiers are self-explanatory. The SCALING
    defaults to the current scaling of the last image PLOTted,  but  can  be
    changed (as in command PLOT) with the /SCALING option.

    The /LEVEL option will draw levels (as defined by the LEVEL command)  at
    their  appropriate  location on the wedge. The modifier Label will label
    the wedge axis with the level values. This is the  default  (i.e.,  some
    levels  should  be  defined)  for  the  EQUALIZATION Mode, for which the
    relationship between pixel hues and image values is strongly non-linear.