QMS 1660 Reference Manual page 47

Defines a larger imageable area for the selected media type. This
increased imageable area affects the default placement of the scaling
points P1 and P2.
Menu Administration/Emulations/HPGL/Expand Mode
Choices On—Turn on expand mode.
Off—Use default scaling points, plotting range, and plotting
Default Off
Sets the image offset from the plotter's origin in 0.01" increments.
Menu Administration/Emulations/HPGL/Origin/X Direction
Choices 0000-8500 (0"-8.5")
Default 0000
Menu Administration/Emulations/HPGL/Origin/Y Direction
Choices 00000-11000 (0"-11.0")
Default 00000
Identifies the original image's paper size.
Menu Administration/Emulations/HPGL/Paper Type
Choices A (letter/8.5"x11.0"), A3 (297x420 mm), A4 (210x297 mm), B
(11.0"x17.0"), Scale to Paper
Default Scale to Paper
area.