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

Whether you’re using Adobe’s free Acrobat Reader or fully functional Acrobat, most of us can agree that while reading PDFs using these tools isn’t so bad, once you start trying to actually work with ...

The more you need to edit or alter PDFs, the closer you come to needing third-party apps. Yet again, though, the Mac comes with PDF tools that are capable and useful — so let's talk about how to use ...

Free software on your phone or tablet lets you scan, create, edit, annotate and even sign digitized documents on the go.