Use your signatures in PDFs To sign a PDF, click on the Pen icon near the top right, and then the Sig icon, and click on the signature you want to use. Then click, hold, and drag across the PDF in ...

Fortunately, Apple has added the ability to electronically sign a PDF document using Preview, a program that comes preinstalled on every Mac running OS X Lion or later.

How to Put a PDF Image in an Outlook Signature. Adding a signature to your emails allows you to include important information by default with all of your correspondence.