EXPLORE Variables:

        Like  SHOW,  VIEW  and  INSPECT_3D,  EXPLORE is controlled by variables.
    Most of them  are among those controlling SHOW:
            SPAN, RANGE, SIZE, CENTER, SCALE, SPACING, DO_BIT  DO_GREY,  DO_CON-
    TOUR, DO_MASK.

    In  addition,  the  SFLUX  variable controls the displayed flux scale in the
    map.