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[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.