Throttle limitation in auto mode

how do I set up my quad plane tailsitter so that when flying in auto mode, it does not use 100% throttle, but let’s say 50 or 60
[edit]
I need to leave him the opportunity to use 100%, but I want him to mostly fly at 50-60

you mean while flying in fixed wing mode between waypoints?

Yes, the fixed wing is in automatic mode