How do you simulate the screen rotation using the emulator?

Pressing CTRL+F11 or CTRL+F12 will change the orientation of the screen, it does not mater which key you use to rotate as there are only two positions.

The Emulator documentation found here.
http://code.google.com/android/reference...tor.html#controlling
lists all the key presses, to get key setup information specific to your setup type at the command line.