Quote:
Originally Posted by DNSB
I don't think showing numbers would do any good since the sliders have no idea what the CSS in the ebook will do to the font size for instance. Unless every epub you read has exactly the same font sizes specified, any relationship between those numbers and what you see on screen will change with the CSS.
One recent book I was reading used 0.789em as the default font size (defined in the body and everywhere else (p, div, blockquote, etc.). The header tags were the only place that a different font size was specified and even that was relative to the body definition. I corrected this by a hack and slash job on the CSS but that's not an option most people would use.
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It would help where font size is either not specified or set at 1.00em/100%. Which is not THAT uncommon, I'm seeing that in many of my purchased ebooks, though not all.
Even with an oddball default font size, once discovering which number was right for reading in daylight on a title, I could then adjust my font larger at night for dark mode, but then easily be able to go back to my daylight setting the next morning. I have a good head for remembering numbers!
One can only hope that publishers will eventually make better ebooks, with more universal defaults for things like margin and font-size. I've got a library book now that's irritating me, because, when I wanted to read it last night with dark mode and the much larger text I need with that, I couldn't set left alignment on it. Ugh.