Transmitter null / neutral - This displays neutral signals of the transmitter as copied by the SET button.

Stick Reverse - This affects the received stick directions but not the sensor-to-servo directions.  Check the diagnose tab before setting  any servo-directions in the mixer tab.

Internal Autotrim Settings - This displays the autotrim values.  This may be adjusted manually if not using an autotrim switch.

Neutral Attitude Calibration Value - These values are generated by the autotrim process.

Hover-Setting For Stick-Option-1 - This is only relevant In the Altitude tab, if Stick Option 1 is selected.   This sets the hover point of the collective pitch stick.

AUX-Channel Assign to - This sets the functions of the AUX channel.

0 Gyro & Mode - Internal gyro, HH on/off, no Autotrim.

1 Trim & Mode - Internal gyro, HH on/off, Autotrim.

2 Trim Only -  External gyro, Autotrim.

3 Home & Trim - GPS, internal gyro, Face Home, autotrim.

4 GPS etc. - GPS, internal gyro, Face Home, Optics on/off, Optics/GPS, GPS off, autotrim

5 (Reserved)