thesandlord,
its entirely feasible to pan and zoom i have pondered this a lot.
when i move the sketches into a database I will be storing them at ridiculous DPI settings.
But thats much later for now, i have other things to consider.

when the new version is released it will automatically be able to stitch together threads of sketches made a few minutes apart and allow them to be viewed in that manner, but theres a whole lot of other code i aim to get in place before i can replace the graffiti view.