I read a couple different books at a time. If I adjust the size of the font in one book, and I jump to another book and adjust the font size sliders again, when I go back to the first book I have to adjust the font sliders again. Not ideal.
I just opened 3 different books in Calibre, all in ePub format, and they all opened with different size text. How do I find out what the current font size is for the EPUB file? I just want to know what I should be changing everything to.