How to password-protect a PDF file in less than 30 seconds
You can keep your personal documents secure on a Windows PC or Mac by using this simple tech tip from our experts ...
Boing Boing on MSN4 天
PDFs don't have to be annoying
TL;DR: Edit, annotate, convert, and scan PDFs with a lifetime subscription to UPDF for just $59.99. If you've ever tried to ...