Reposition the NDS (DeSmuMe) Screens?

On the DeSmuMe Nintendo DS emulator is it possible to move the screens apart from each other or reposition them?, i know you can changer there orientation via the core options by i mean manual reposition the screen. I was toying with the idea of have a NDS border like the following…

http://www.imagenes-juegos.com/nintendo … 9014-i.jpg

but atm thats not possible as im not sure how to move and change the size of each screen