I just discovered additional controls After you click on the Thumbnail and it expands . in the upper right of the black window, there are controls (hover says 32%, which may account for issues), Those allow to make it way bigger yet, with a Magnifier.
(I don't use All, when Replacing. Some from bad luck with early versions, and others where I only want to do the replace AFTER the start point.
See, I can read

it without thos Bionic eyes.