How to digitally sign a PDF when you don't have access to a printer and scanner

You can digitally sign a PDF in several different ways, including Adobe Acrobat, Apple's Preview app, and mobile apps, among ...

How to password protect a PDF in Adobe Acrobat Reader and shield your sensitive data

To password protect a PDF in Adobe Acrobat Reader, you'll need the paid Pro version, which starts at $14.99 a month.
Macworld on MSN

Wondershare PDFelement: The smart alternative to Adobe Acrobat

Macworld PDFs remain an important part of work and studies, with many documents using the format. Working with them can be a time-consuming and costly affair though, which is something Wondershare has ...