Here's a bunch of tips on panning with the middle mouse button:
- You're not restricted to the drawing area while panning -- you can keep moving the view as long as you can physically move your mouse, even if the cursor reaches the edge of the screen.
- Holding CTRL will allow you to pan in any direction, as far as you want, until you release the middle button. The farther you move the mouse from its original position, the faster the view moves.
- Up to AutoCAD 2004, and in all versions of AutoCAD LT, holding SHIFT will constrain the panning to orthogonal directions.
- In AutoCAD 2007+, pressing SHIFT and then the middle button launches 3D orbit. However, if you hold down the button first, then press SHIFT, it will pan orthogonally as in previous versions.
- In AutoCAD 2007 and up, SHIFT+CTRL+middle button launches a 3D free orbit.