These define the minimum offset from the top left physical corner of the paper to the 0,0 print position (in twips).
XORIGIN=###
YORIGIN=###
A-Shell and APEX will operate on the LARGER of the XORIGIN,YORIGIN values and the physical margin as defined by the printer driver. So in other words, if you set them each to 360, you should get AT LEAST 1/4" top/left margin, even on printers (like some image printers, PDF printers, and even APEX itself) that don't have any built-in physical margin limitation. This can be very useful in reducing the alignment fluctuations between different printer models caused by differing hardware paper margins.
