Commenting PDF Files

Commenting allows you to review a PDF document and add your annotations, comments and other text and graphical information regarding its content. Comments may address certain parts of the document that require changes, or be used as a part of collaborative work on the document to tell other authors your thoughts and opinions. Commenting tools do not alter the original content of the PDF document, and comments are not displayed in the printed document.

In Master PDF Editor you have a number of commenting tools:

You can also view and filter comments as well as export and import them.