Wiktionary talk:Votes/pl-2010-03/Bolding letters in initialisms

Boldface is doubled emphasis. It is used for main headings, dictionary headwords, and other elements that need to stand out within the structure of a page. It is not normally used to emphasize text that within a paragraph, a line, or a word. Setting bold letters this way looks amateurish. Like a blink tag for print.

If emphasis is needed to pick out letters, then it's better to italicize them.

But really, do we need to treat the reader like a dimwit who can't tell that the initialism YMMV comes from the initials in your mileage may vary? —Michael Z. 2010-03-10 03:44 z

Boy and tossing initial capitals into the mix is not only triple-emphasis, in a language reference it is misleading. Apple cider vinegar is not a proper name to be capitalized. —Michael Z. 2010-03-10 03:50 z