Originally Posted by EldRick
Good experimentation - thanks.
What I'm interested in is 1-point font size changes in the 23 to 27 range, where they start skipping sizes. I also use left margin 2 and right margin 1, neither of which seems to be accessible from the slider.
I haven't played much with the font sizes, but I think any integer in the range will be accepted.
Personally, I do this in the database rather than the configuration file. That way I get per book settings. The differences between epubs and kepubs mean that I would have to adjust things each time I changed types. Though I normally read epubs, I have bought a few books from Kobo recently and am trying the kepub version.