Auto-rotate is a setting that, when turned on, allows Android to automatically rotate the screen based on the physical orientation of the device.

If you accidentally rotate the screen to an undesirable position, it can be difficult to click "Revert" to change it back. However, if you wait 15 seconds, the screen will automatically revert ...

Well, a nice guy named Samir has written up a little Symbian app that lets you rotate your screen using a hotkey or, if you have an N95, by turning the screen. Handy, that.