Ubuntu terminal server client - exit full screen

It took me a while to figure out how to exit full screen mode in terminal server client. The toggle keys are CTRL-ALT-ENTER.

The documentation on the sourceforge page for TSClient isn't the best.

http://sourceforge.net/projects/tsclient

Being new to Linux, I continue having trouble keeping track of Gnome, KDE, Ubuntu, etc (different things that don't even fall into the same category - oh well, I'll learn).