By enabling commenting rights in a PDF, Adobe Reader 8.0 users can participate in reviews of that PDF. When a PDF with commenting rights opens in Reader, it includes a document message bar, a How To pane with instructions, and commenting tools that are otherwise unavailable.
Use either of these methods
to enable commenting for Reader users:In an open PDF, choose Comments > Enable For Commenting In Adobe Reader, and then save the PDF.
Start the wizard to initiate a shared review or an email-based review and follow the on-screen instructions. When you’re finished, commenting is enabled in the PDF that you specify for the review.