/*
* Define default maximum and minimum plotting coordinates.
* P1 (xmin, ymin), P2 (xmax, ymax)
*
* PaperSize can be:
* "A3" ISO (420mm by 297mm)
* "A4" ISO (297mm by 210mm)
* "A" ANSI (11" by 8.5")
* "B" ANSI (17" by 11")
*
* Mode can be: "HPGL" or "DXY"
*
* Don McCormick
*/