Is "bolded" a word?

Is bolded a word?

I just bolded the important text in this sentence.

I'd say in the context of computer editing, bold is certainly used as a verb (e.g. bold that paragraph, I bolded the important points), beyond that it depends on your criteria for what makes a word.

Wikitionary certainly cites this use as a word, and I trust them more than the OED for defintions of "new" words or meanings of words.

Verb
bold (third-person singular simple present bolds, present participle bolding, simple past and past participle bolded)
To make a selected portion of text have a typeface with thicker and heavier strokes.

Bold is not strictly a verb (but it is sometimes used as one). Made bold is a way to express correctly what you are trying to say.

In conversation, copy editors have long used this as a verb, even as they would never allow it in the most formal of published copy. Context is everything. If you care, then it is important to know why you care if someone thinks you should not use it.

Bold is available as a verb and bolded would be its past tense, but it's more usual to use embolden.