RGMAP /PENS

        [GREG2\]RGMAP /PENS [Pos Neg]

    Selects  the pens for positive and negative contours. Three modes of op-
    eration are possible :
      - Without option /PENS, positive contour levels use pen 0 and negative
        contour  levels  use  pen 15. Positive means that the value given in
        command LEVELS is positive, not the final contour level value  which
        is affected by a possibly negative factor.
      - With option /PENS, all contours use the current pen.
      - With  /PENS Pos Neg,  positive contours use pen number Pos and nega-
        tive contours use pen number Neg.