Butterick introduced me to Bitstream Charter for which I'm very greatful. However, I would very strongly urge people to disregard his recommendations for representing hyperlinks.

Instead of just underlining hyperlinks, he has this demented nonsense:

> Cross-references, denoted with small caps, are clickable.

> Links to outside material are denoted with a red circle, like so.

Hyperlinks are almost universally distinguished by underlining them. There is no rational reason to invent a new design language and expect people to learn it. And for what benefit? The seemingly random capitalisation of words and weird circles in the middle of the text makes it much more jarring than simple underlining.

Smallcaps hyperlinks is even worse than it might initially sound: many ESL speakers have difficulty with text written in all-caps, and it totally makes sense why, if you think about it.