Spektrum DX6i Manual page 120

Rotate the roller to adjust the throttle value at the select stick position.
After the desired value is programmed press the roller to deselect the value.
: In Throttle Hold the throttle curve is a flat line representing a hold condition. The Hold
position can be adjusted using the values as above.
Repeat this step for all stick positions and for all flight modes.
Press and hold the roller for more than 3 seconds then release the roller and the system will return
to the main screen.
Rotate the roller to highlight LIST then press the roller.
The throttle trim lever is only active when the flight mode switch is in the normal position. The throttle trim is used
to increase or decrease the engine rpm to achieve a reliable idle when in the Normal Mode. The throttle trim lever
has no effect in flight modes 1 (Stunt), or in throttle hold.
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