DV: 1=HP7550_HPGL, 2=HP7221_series, 3=PT Slide-Maker, 4=Postscript Printer.
ID: Plot ID label (defaulted to the name of file being plotted. Max 32 chars).
PF: Page feed-off allows for overlaying another plot on the same hardcopy.
NC: Number of hardcopies to make in single print-job (done by PRINT/COPIES=N).
PO: Origin offsets (x,y) in inches from the current screen graph origin.
SF: Overall plot scale factors (x,y) for enlarge (>1.0) or shrink (<1.0).
LW: Linewidth or plotting stylus in number of the default LW.
VP: Vertical page alignment is 90 degree rotation from the default orientation.
PS: Pen speed is normalized from 1 to 9 with 9 the highest pen speed available.
FT: Film type (1=Ektachrome-100 slide; 2=Polaroid polychrome instant slide).
BC: 1=Black, 2=Medium-gray, 3=Dark-blue, 4=Medium-blue, 5=Light-gray, 6=Red.
OD: a filename or logical-address directly for optional hardcopy dump.
