We show you how to add notes to a PDF with Microsoft Edge, Adobe Acrobat Online, and the free PDF viewer UPDF.

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, just like its paper-based cousin ...

Microsoft Edge is gaining new PDF reader features within the Windows 10 Fall Creator’s Update—everything from sticky notes to inked signatures. It’s part of Microsoft’s bid to compete with ...

You can customize the color and font of your notes, but otherwise it’s a pretty bare-bones extension with a coded-by-hand aesthetic. And, just like sticky notes in real life, its simplicity is ...