THEMA:

Episode 3 of the Virtual Sensor Extended Functions app deals with the special GPS functions in the app for those with 14 and 16 generation 1 transmitters with a monochrome screen. This allows for some simple circular or partial circle shaped no-fly zones to be programmed in.
Those who have a transmitter with a colour screen should use the Google Maps app which has far more features, and it is easier to program no-fly zones into it.