Random Thoughts on Instructional Design
You may want to create PDF documents and/or portfolios that allow viewers to comment and respond to its content. The commenting and markup tools allow you to insert detailed comments, highlight, replace, insert, and delete text, and use graphics to comment on documents.
If you enable commenting rights in a PDF, instructors and peers can offer feedback even if they do not have a copy of Adobe Acrobat. Enabling these rights allow viewers’ using Adobe Reader 8 or later to participate in reviews of that PDF.
When a PDF with commenting rights opens in Reader, it includes a document message bar and commenting tools that are otherwise unavailable.