(stereowin CAM-ID [no|horizontal|vertical|colored] [gapsize])
A gap of
gapsize pixels is left between subwindows;
if omitted, subwindows are adjacent.
If both layout and gapsize are omitted, e.g. (stereowin CAM-ID),
returns current settings as a
(stereowin ...) command list.
This command doesn't set stereo projection; use
merge camera or
camera to set the stereyes transforms, and
merge window or
window to set the pixel aspect ratio & window position if needed.