randr: "reverse panning"

[Andriy Gapon]

Sorry for not following the latest RandR developments, but let me ask.
Does RandR support setting a monitor mode to NxM resolution (e.g. its native
resolution) while setting its 'effective pixel resolution' (a term just invented
by me) to PxR where P <= N and/or R <= M?
In other words, can I have a monitor set to its native resolution while using
only a portion of its pixels as if it had some other, smaller resolution.

For one possible practical use please see this:
http://lists.x.org/archives/xorg/2009-November/047965.html

Thanks!
-- 
Andriy Gapon