For the vision, as so someone else stated, the diagram doesn't yet apply. The left switch seems to do nothing at the moment, but the right switch, or s1 is pretty important for now. With both switches up, per the instructions, while you are flying, if you have to turn off the controller to enter fail safe/ return home mode, the right switch will allow you to take back control once you've turned the controller back on, and the p2v is back with in range, or away from the reason it lost the signal to begin with. Flip it down, then back up. This saved my rear the other night, and I'm super relieved I read about it somewhere enough times, that I was able to use it intinctually though I was in a slight panic at the time.
This minor, but could have been bad episode, definitely burned the importance of a good clear take off zone each and every time we fly, so the path home is un-obstructed if it's in rth mode.
Safe flying all,
Rich