To properly sign a PDF on your Android phone or tablet, you'll need to download an app from the Google Play Store.

What do you do if you receive a PDF document by e-mail and need to sign it and send it back? You probably print it out, sign it, and then scan it again before e-mailing it. It’s a tedious process and ...

Imagine this: you’re racing against a deadline, juggling multiple PDF files that need editing, organizing, and sharing. You open Adobe Acrobat, and within minutes ...