Being "up in years" myself, vision is an increasing factor. I have learned when the particular viewer is displayed that uses only the directional arrows and the pyramind-looking lines in the center, that I can utilize the smaller display above those icons. Clicking on an area of the smaller page in that block will take the display to wherever you clicked.
I also learned to save the image to my harddrive, if wanted. This allows me to open the image in my photo program and in the printing instructions, to "size the image to the page." It creates a larger image for printing.
Perhaps these different viewers have something to do with how the images are created.
My biggest complaint regarding Ancestry is there is no way to direct these concerns to the powers that be to either get explanations, ask for changes, etc. We peasants aren't supposed to understand anything, just pay for using the site.
I normally do not frequent this message board, but was seeking information on the different viewers. Obviously, it is only we frustrated users discussing same.
Well, in the meanwhile, since I cannot travel, I do rely on databases implemented to the internet.