FUTABA 12K Instruction Manual page 58

*When you want to reset the value to the initial state, push
the RTN button for one second.
Changing the student's channel
*The setting above allows setting of the channel assignment
of student side when [MIX] or [FUNC] was selected.
<Functions of System Menu>
58
In case of MULTIROTOR type
*Please do not use REVERSE, END POINT and any other
Mixers at student transmitter.