Newps writes:

All it does is relieve the pressure. If there were no trim at all the
elevator would be in the exact same position, it would just suck to have
to hold it there.

That's just it: If there were no trim at all, the elevator wouldn't
be there. It would be in its neutral position. Of course you can
_push_ it there, but with trim set, it goes there and stays there
without being pushed (by you).

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