ePub version doesn’t allow varying font size.

[hugofalkman]

In iOS12, iBooks allows varying font type but not font size of this book.

[hugofalkman]

I discovered varying font size works in iBooks under macOS 10.14.5 Mojave.

In iOS 12.3.1 varying font type works but not font size. All other books also allow varying font size. Behaviour is identical on iPhone and iPad under iOS 12.3.1.

[heckj]

thanks Hugo - i’ll have to look a little more deeply into the epub spec and see what’s supported by the asciidoctor tool chain, which is what i’m using to generate the ebook format.

[heckj]

👋 Hi hugo

I was just checking on this when reviewing the distributed ePub, and the fonts are correctly changing for me when I'm viewing it (Books.app on Catalina - 10.15) - I did verify that the fonts don't easily change size on iOS, but I think that's a limitation of the toolchain I'm using to generate the ePub. I'll keep this open to continue to work on resolving it, but I don't have a clear path yet on how to do so.