The manual says to fly the model to a spot and use the F3 key to mark that spot, then use F4 to bring it back to that spot.
Specifically, I want to fly the model to a spot in a particular maneuver and then use F4 to bring me back to that spot in the maneuver
to practice it.

What am I doing wrong, as the F3 and F4 keys don't do a thing?

Thanks
Bob