If you want to write something in an existing PDF file, and then save your changes, you have software such as, PDF Architect, iSkysoft PDF Editor and Sejda offer viable solutions, but they're far ...

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 ...

To do that, launch the Messages app and open the text message to save it as a PDF. Take a screenshot of that message on your ...