How to Write Notes on PDF Files. The Sticky Note tool in Adobe Acrobat and Adobe Reader allows for commenting on your business PDF files. The tool can display notes in multiple colors and styles ...

The Sticky Note and Highlight tools are only available in Adobe Reader if the document author enabled Reader comments when she created the PDF.

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 ...