I see you are a bit confused. Please explain us better because in your first post you say: I want to configure the button of the command to turn off so that the deco
turns off completely and does nothing else".
Now you talk about "+ power and hibernate": what does it mean?
There are only two possible ways of putting the STB in standby (but not completely switched off): the standby and the DeepStandBy.
The first is not a real powering off, is the more power consuming. STB will get awake immediately, without booting the operative system (what we call enigma2 "image").
The second is less consuming and you'll need to boot the whole image.
But also the DeepStandBy is not like switching off the STB by the power button and you'll be able to have a scheduled timer working even in this state: the STB will boot the system and will execute the timer.
There is no hibernation mode.
Anyway: everything you can do is by the Setup/User Interface/Button Setup. If you have any doubts you can also have a look at this little guide of mine:
How to program buttons in OBH
https://www.vuplus-community.net/board/threads/how-to-program-buttons-in-obh.40267/