[GrannyGrump]

Of course, the first thing to ask --- are you doing this for your own personal reading? Or are you producing a book to distribute to other people?

There are things you can do to make it look exactly as you wish if you only have to set it up for your own device/software. But other people won't be using your device or software, and as everybody here is warning you, things can go very wrong. You can test this yourself just by changing font sizes in your own reader, and see what happens.


ps--@TheDucks --- OSFN ??? One Size Fits Nobody?