How to Add Comments to a PDF With Acrobat Reader. PDF files enable you to share and comment on content created in a wide range of applications. Adobe Reader, formerly called Acrobat Reader, offers ...

How to Allow Commenting on PDF Files. If you want to allow commenting on a PDF file, you must be the author of the file or have access to the Adobe Acrobat program that was used to construct it.

Wondering how to edit a PDF on a Mac? Want to do it for free? You can! There is a free PDF editor built right into MacOS and it's really easy to use. We show you how to edit a PDF on a Mac, plus ...

That said, free users can make certain changes to PDF files without a paid plan. As a free user, you can add comments, highlight sections, draw on a document, add new text, and sign documents.

Whether you’re looking to save to PDF, add a signature or a password, combine multiple PDFs, or convert to Word, we can help you edit a PDF online for free.

Learn how to use tools to create, annotate, and extract text from a PDF on a Chromebook.