Cagedh:
I have exactly 0.00 hours flight experience in an Airbus. Only Boeing. But if I understand the posting you just made, the 777 autotrim function works in a similar way as on the Airbus. It prevents pitch changes by staying in trim. This is unlike any other previous Boeing type, such as the 737,747,757,767.
Also, the autotrim function on the 777 can not be switched off. It is simply there all the time. It also does not have any modes or features. it is always there to help you or annoy you.