I'm sorry but it is not possible to change the font in the Acrobat Pro 9
preferences (see the screen shot) you can only change the font size.
I would like to use different font for different comment
Do you mean in a script, or just in Acroabt?
Because you can change the comments' font by going to Preferences -
Commenting - Font
Here after two screens shot, we see that :
- the text style can be modified only in bold, italic, underline, superscript and subscript when you edit a sticky note for example
- only the size can be modified in the acrobat preferences
But you can't change the font used and select an Arial Font instead of a TImes New Romans for example.
My workaround is to open MS Word, type a word, change the font to say 24 (or larger if you wish) copy the text and gp back to your comment in the pdf and paste. You can now type with that font. If you will be doing lots of commenting you can create a template text box in the Adobe pdf with different fonts using this method and simply copy and paste whichever you need. This way you can have different fonts in the same text box.