Is there a way to remove the interface (to take a movie with RTW)

I want to use RTW to make a movie for latin class, and i was wondering if there was a way to remove the interface with a cheat or something so i could film without there being the little bar at the bottom.

Does anyone know how to do this? (I remember in MTW there was a way to remove it with a hotkey)

In preferences.txt set MINIMAL_UI to TRUE. Then you can remove the all the interface stuff on the screen with F5, F6 and F7.