zoom behaviour:

Hmm, either you have not understood the meaning of my post, or
I have not understood the meaning of the word "Always".

Image 1: only 20% of it is showing because of zoom.
Press key to go to image 2.
Menu option "View / Always Fit Opened Images on Screen" has previously been selected

Given the usual meaning of the word "Always".... why would only 20% of image 2 show up?

Full screen behaviour: believe me, many people have complained to apple about this, for years. No luck. Given that splat-F can be usefully entered twice in V2.2, but only once in V3, that will be enough to keep me on V2.2 forever, which is unfortunate, because there is so much other stuff to like in V3.