1st question. When I have the Alt Hold for the AP engaged, does the AP automatically trim the aircraft, I only ask because if the AP is engaged at a specific Altitude, I am still able to use the trim wheel up or down, but as far as I can tell it just makes the pitch swing up and down until it re-stabilizes. So is it true that once you have the AP alt hold engaged you can't trim due to the AP automatically setting the trim pitch?

2nd question, if I have the AP holding an altitude, am I able to set a pitch angle for climb or decent on AP while still keeping the AP engaged?  (i.e. 1500 fpm)

Just want to make sure that I am doing this right. I hope the AP automatically trims the aircraft with Alt Hold.

Thanks! :)