I was at an education conference yesterday and was showing the Commenting feature of Acrobat 9. A teacher asked me if she can add audio annotation to the PDF for comment and review purpose. Interestingly, there is no option for audio comment at the Comment and Mark Up toolbar. I thought it was possible so I searched around the file menus. Nothing from the Comments Menu. But after some more digging, I found it. It was available at the Tools/Comment and Markup submenu. No very obvious I may say. But it is there. Hopefully that is a little feature that mya be of use to you.
By Brian Chau
March 24, 2010