Do you underline words in headings and body text? Don't.
Underlining slows and confuses readers. It's a hangover from typewriters. I wished I'd known these 3 tips years ago.
1. Avoid underlining your words for emphasis. Use it for hyperlinks only.
2. Use bold for headings and subheadings.
3. Use itals judiciously in body text. Uncluttered presentation makes life easy for readers.