FUTABA 12Z Series Instruction Manual page 29

*The setting above allows setting of the servo throw relative
to the amount of student side operation when [MIX] or
[FUNC] was selected.
*When setting the switch at each channel, use the cursor
lever to move to the "SW" item of the channel you want to
change, call the switch setup screen by pushing the enter
button, and select the switch.
When using at the student side
*When changing the mode, use the cursor lever to move
to the item you want to change and change the mode by
turning the data input dial to the left or right. The display
blinks. Press the enter button to change the mode.
<Functions of System Menu> 29