Unboldface

[…]making these functions even slower and more distracting to perform, since the screen had to be watched very closely and some words and characters gone over three or four times to get them underlined or "unboldfaced."

Source: wiktionary

Microsoft Word doesn’t make you look under the hood and be your own mechanic just to unboldface or uncenter a bit of text.

Source: wiktionary

Unboldfacing Text / To unboldface a block of text, use these steps. ① Move the cursor to the first character of the text to be unboldfaced—in this case, to the U in U.S.

Source: wiktionary

Click the button a second time to “unboldface” the text, making it regular text.

Source: wiktionary