Master the file format that works everywhere and anywhere—even from your phone.

You can combine multiple PDF files into a single, easy-to-share document using simple software on your Mac computer or Windows PC. Here's how.

Need to save and share a webpage in a hurry? The best way is to create a PDF file. Here are step-by-step instructions revealing how to save a webpage as a PDF.

How the creator of a PDF file sets up her document determines the extent to which you can use Acrobat Reader's commenting tools to mark the file with notes about its content.