Return to home is an autonomous feature powered by a combination of imaging sensors and GPS data. It works as you’d come to expect – it returns the drone back home, with home being the location from where it took off.
There are several ways RTH features can be activated.
For starters, RTH can be activated as a standalone feature, usually via a dedicated button on the controller. On top of that, drone makers usually put RTH on the GUI of their apps. Those are basically the only two manual RTH methods. The following duo is activated automatically: