Ah, I didn't know this was done in flight. Maybe that's why the option is always greyed out in the app. I've never tried it when the drone is in the air. Unfortunately, in this case the drone will not take off, so this option is off the table.
My Tello EDU is having a problem. On takeoff, it flies diagonally back and to the right. It only gets a couple inches off the ground then crashes. "Navigation system error" is displayed on the app. Fixes I have tried:
I have tried updating the firmware with the Tello APK download from the link...