I haven’t found a way to do this with the headline block but it’s something I think would be nice to have as part of the headline block.
Would this be to underline the entire Headline, or only specific words within it?
For the entire Headline, you can use the bottom border option.
Ah, border bottom option is a great option. I was thinking for just the highlighted text in the Headline block but the border bottom will work for most cases. Thanks!