Nexus 7 screen size

Hi,

Is there anyway to manually specify the screen size on my Nexus 7?

So say instead of the OS taking up the entire screen it only uses say 6.5" of the screen and blacks out the rest?

Do you reckon this is possible?

Thanks,
Chay

from xda-developers http://ift.tt/2bBiEK9
via IFTTT