button to toggle between: fullscreen <> status bar

any devices have no hardware buttons for the function: home and back to toggle between
fullscreen and statusbar.
you must e.g. long press the power button thats very nagy

a button in oruxmaps to toggle between: fullsreen <> statusbar would be very useful otherwise
If the program is in full screen mode,you can not return from menu like settings or trackfiles.

thanks
nanu