The phrase "boldface type" refers to text that is printed in a darker, thicker, or bolder font style. It is used to highlight or emphasize certain words or phrases in a written text. Full definition
Canada's largest newspaper, the Toronto Star, will put subsequent information about acquittals or dropped charges at the top of an online story in boldface type when someone requests it and provides proof. (abajournal.com)
Use a clearly legible font and make sparing use of boldface type for section headers. (work.chron.com)
Mr. Tsunis's name was in boldface type at the top. (nytimes.com)