Annotate & review PDF files

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One of the biggest advantages of working with PDF is having the ability to annotate electronically in the same ways you can with paper. With Nitro PDF Professional, comments can be added to pages as sticky notes, text highlighting, text boxes, drawing markups, stamps, and file attachments. (See the Annotate PDF page for full info on the commenting features.)

Highlight text in PDF
Sticky notes in PDF
Text Boxes in PDF
Call Outs in PDF
Markup & drawings in PDF
Stamps annotations in PDF
File attachments in PDF
Organize and view PDF comments

Most types of comments include a pop-up note for you to add a text message to them. For example, if you've marked some text with the Highlight Text tool, just open its pop-up note and enter your feedback to explain why you've highlighted it. All commenting and drawing tools are accessible from the Review tab.