I would like to be able to emulate a dual monitor set up using a single physical display. Ideally, X11 would be able to treat each left/right half of the monitor as a separate display. Is this possible with X11?
I've cobbled together some crude images to attempt to better clarify what my intent is.
Imagine the following dual monitor set up:
Since I only have a single, large, widescreen monitor, I would like X11 to believe that the single physical display is actually two displays; each taking up a horizontal half of the physical display space, as follows: