You could try adding KOReader, a long-press on an image in an epub will scale it to full screen. There are a number of tweaks, for image display, in the works at github that get worked on from time to time.
Edit: I just checked using a .cbz file I had made with large images and a long press on a picture that was displayed as half of the original image per page, crashed out of KOReader. I will look for an epub with large embedded images.
Luck;
Ken
Last edited by Ken Maltby; 01-07-2018 at 09:08 AM.
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