I have created collections using images with an aspect ratio of 16 x 9 for the page banner. They look fine in the editor, but when I go to live full screen, They are cropped severely on the top and bottom.
yes. I have figured that if I make the aspect ratio of an image very shallow, it will fit. So the problem seems to be that the collection banner is too shallow to accommodate a normal sized image. By the time I get it to an aspect ratio that works, the image is unusable.