Call with HPGL2 [options]
   Options:
        -Ixx: where xx is the hex interrupt vector.
                          0x7b is the default.

        -Cx:  where x is the serial port 1 or 2.
                          COM1 is the default (Not Recommended!).

        -Lx:  where x is the parallel port 1, 2, or 3.
                          LPT1: is the default.

        -Ffilename: plot TO a file, where filename is the name of the file.
                          Default is to plot directly to the plotter.

        -P: No PageAdvance after plot.
                          Default is to send a page advance after every plot.

        -E: Disables the paper cutter.

        -V: Pen plotters need pen velocity.
                          Default is for line weights (electrostatic plotters).

        -R: Lets you make a number of extra copies.
                          Default is one copy.

        -M: Change plotting units to metric.
                          Default is inches.

        -?: or -H: Prints this message.
