Here is crazy way to pan across your drawing. It will take some practice to get used to but if you are having to pan across a large drawing, this can be a useful tip.

• Hold CTRL
• Press and hold the mouse scroll-wheel
• Move  the mouse away from the direction that you want to go in. This is similar to how you normally pan except that you press and hold the scroll wheel.

The further away you move the cursor, the faster it pans.

You can also change directions in the middle of this method.

Enough describing – check it out for yourself!!!!