This video will cover how to setup Panic mode. Panic mode is similar to a SAFE Self Level/Angle Demand mode, but it is accessed with a separate two position switch/button that acts more as an override to the current set flight mode. While the desired effect might be achievable by just having a SAFE flight mode to resort to, some might prefer this method instead. Panic setup requires having configured and tuned at least one flight mode with SAFE Self Level/Angle Demand mode.
AR637T Receiver:
https://www.horizonhobby.com/ar637t-6-channel-as3x-telemetry-receiver-spmar637t
Update Cable:
https://www.horizonhobby.com/as3x-programming-cable---usb-interface-spma3065
Update Software:
http://spektrumrc.cachefly.net/apps/spektrum_programmer.html