We added a little known feature in AutoCAD 2004 which is also in AutoCAD 2005. I figured I would explain this after reading a post in a newsgroup with a customer trying to figure out this discovery. You must have AutoCAD 2004 or higher installed and on Microsoft Windows 2000/XP. Edge panning is when you are panning the display by mouse in the AutoCAD window, and then you reach the edge of the maximized AutoCAD window and the display pans while you continue to move the mouse towards the edge. Pretty cool, give it a try. It comes in pretty handy when in large drawings as you do not have to reposition your mouse to be able to pan more of the drawing.
Click on the GIF image to see a larger Animated GIF of the difference from AutoCAD 2002 without Edge Panning and AutoCAD 2005 with Edge Panning.