Hi Paul, I'll take it for granted that you downloaded and installed Litchi, and that is the program you are asking about. I don't know for sure that you need to be logged into your Litchi account to fly or change settings, but I would think so. Once you login it is saved and you shouldn't have to do it again. You do need to be logged in to synchronize and fly waypoint missions that you make and save on the PC. Anyhow once you are in Litchi and logged on to your account, you also need the drone turned on and connected to make setting changes. As you said, go to settings (upper right), then to aircraft, then tap the box that the RTH Altitude is in, and change it to what you want. Do the same with the maximum altitude, tap in the box with the maximum altitude number and change it to what you want. Exit out of the settings box and it should be all set. As I mentioned you can create waypoint missions on the Litchi mission hub, save the mission under whatever name you want and when you go to the waypoint mode on Litchi, the saved mission will be there. You need to be logged into your Litchi account and be connected to wifi with the
smart controller so it can download the mission from Litchi mission hub.