Screen 1.
'a' 's' full screen on and off.
'q' 'w' heads up display on/off
'e' 'r' scrolls through hud info.
't' 'y' scrolls through hud sub-pages.
Screen 2
'd' 'f' full screen on and off.
'z' 'x' heads up display on/off
'c' 'v' scrolls through hud info.
'b' 'n' scrolls through hud sub-pages.
This is current up to d42 build.
