Depending on your version of the Acrobat Pro software, it might look different. (I'm using the DC version below.) But the idea is this:

Textual comments like the text frame can be set from the comments bar.

The font of the text in the Comments list and panel can't be set. Only a few visual properties can be personalised, but not the font. That's part of the overall interface of Acrobat.

Oorspronkelijk geplaatst op Quora: How can I change the font on comments I've added to a PDF in Adobe Acrobat Pro?

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