Hi,
seems possible. From the examples section of the xrandr man page:
Code:
Enables panning on a 1600x768 desktop while displaying 1024x768 mode on an output called VGA:
xrandr --fb 1600x768 --output VGA --mode 1024x768 --panning 1600x0
Edit: hmm, I see now you say "zoom out", where as panning is more like zooming in... maybe it's not what you want.
Cheers,
Evo2.