Spot on. Perhaps I could have used a different term, but 'baseline' gives visitors an immediate sense of what the tool does. The purpose is to mimic the effect

Spot on. Perhaps I could have used a different term, but 'baseline' gives visitors an immediate sense of what the tool does. The purpose is to mimic the effect of a print baseline by enforcing vertical rhythm, and while not perfect, it's often better than none at all.