I pressed F11 and nothing... F10 and nothing. i don't know how to set the friggin' shortcut!!
i have not yet downloaded this, but setting a gui controll is simple.
first, you go to OPTIONS
then press CONTROLLS
then you scroll down the list and try to find the GUI for it.
double click on it once you find it, then press a button or combo of buttons that will set it of, like shift M for mission editor.
you should be carefull with it however, it is much more complicated then an options menu...