FUTABA 16SZ Instruction Manual page 79

Trim setting
This function adjusts the digital trim's control
Control step amount setting
▲▲ ▲ ▼▼ ▼
*When the value is made large, the change per step becomes
larger.
＜ Linkage menu ＞
80
When the flight conditions are set, the trim
operation can be coupled with any of the conditions
selected through combination mode.
Separate/combination mode selection
[Comb.]
[Separ.]