Why doesn't Return To Home work in iNav?

If you're new to iNav, there may be something in the Configurator that has you confused. You get everything set up, but then look at the modes page. You put your mode switch to manual, and it lights up blue. Next up, Angle or Horizon, and they turn blue too. Then you try RTH, but nothing happens. Is something wrong? Will it not work? Do I need to change a setting? Check out this video to find out. This will be the same for most navigation flight modes.

** In this video **
The different RTH altitude modes can be found here: https://github.com/iNavFlight/inav/wi...
FrSky Horus X10S Express: https://bit.ly/MrD_3l7b8K5
Matek F405-WING: http://bit.ly/MrD_2sxgQLT

** Contents **
00:00 Introduction
00:43 What's happening in the modes tab
02:31 How can we test Return to Home?
02:51 What can we do in configurator to prepare for RTH?
04:03 The Return to Home settings
08:24 RTH Home Altitude
10:00 Conclusion

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Thank you for your time, and don't forget to fly it like you stole it!