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 ...

With Adobe Acrobat Reader and Adobe’s online PDF editor, you can add comments, fill out forms, insert text, and even sign documents – all for free.

Can a free PDF editor meet your needs? Find out which of Adobe's PDF editing tools is the perfect version for you.