It's been a couple years since I've been in the books but here goes - moving the trim switch basically takes a snapshot of the current speed. I think the actual limit it will adjust is 10 kts per click. So if you're 20 kts off of trimmed speed - click, click, and you're in trim. Because of that you trim a lot less.
And it auto trims for configuration changes. Very user friendly.
Last edited by misd-agin; 7th December 2014 at 15:31.
Reason: Added last two sentences.