If this is intended purely as an EPUB, then you should have no problems using an SVG Wrapper.
There is a recent Sigil Plugin,
InsertImageSVG, which should help speed up the process of creating much of the SVG Wrapper code for you:
https://www.mobileread.com/forums/sh...d.php?t=283333
Each PNG should then stretch to fill up the entire screen.
Quote:
Originally Posted by fbrzvnrnd
If not, try to remove the height: 98vh; and add:
.image_full img {width:100%}
And see what is gonna happen.
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I agree with fbrzvnrnd's recommendation.
And vh is a CSS3 measurement and probably won't work on a vast majority of EPUB readers.