Hi,

Definitely an interesting issue. I'm interested as well by the return as well.

Not being a math guy by education, I just established the font scaling by trial and error.

What I discovered, however, that the resizing issue is getting even more tricky when it comes not only to one single font size but a couple of distinct font values, and even worse, a couple of distinct font sizes and font values. I systematically offer "automatic value" as a default choice with an option to a "manual setting".

An effective formula would help:)