simple idea - when trying to draw something and need to access an area off screen you have to actually zoom out in the oppisite direct you want to head, then zoom back in to that area.. or go through a bunch of clicking to move the current viewable area.. why not have zoom in/zoom out to center.. meaning where ever your mouse is set instead of zooming in ON it.. zoom in, but shift toward center of the viewable area...
not sure if I discribed this correctly but you should be able to get the point. it's actually a much more natural maneuver
so basically, like here in my video.. I'd be able to keep my mouse where it is, but the area the mouse is on would shift toward the center as I zoomed out,.. this way you'd avoid the whole reverse direction movement to get the area I need access to on the screen..
http://autode.sk/2brdVJd