Learning Centers

Introduction to Acrobat & PDF

If you've ever wondered about PDF, or even if you've just been annoyed when that "Adobe thing" pops up when you are surfing the web, you'll find something of interest here. In this Learning Center at Planet PDF we try to answer some of the most basic questions about PDF.

About the Author
Duff Johnson picture

Duff Johnson

Since 2011, Duff has worked in the ECM industry specializing in PDF technology since 1995. An industry leader, Duff co-chairs the international committee that manages ISO 32000, the specification for the PDF file format. Responsible for marketing and product...  More


What is PDF?

By Duff Johnson

Word, Excel, TIFF. PostScript, HTML, XML, all have their pluses and minuses - but none of them are PDF. What makes our favorite format so special to business and government? In celebration of PDF technology, Duff delivers a little history of the magic behind the world's most popular electronic document file format.

What is Adobe Acrobat?

By Duff Johnson

The core desktop application from Adobe Systems for creating and managing PDFs. Adobe Acrobat 6.01 is available in Standard and Professional versions, as well as "Elements" for large-scale corporate desktops.

What is Adobe Reader?

By Duff Johnson

The truly essential application, Adobe Systems' Reader, now at version 6.01, sets the standard for viewing and printing PDF files. If you don't already have Adobe Reader 6.01 installed, we strongly suggest you do so. It's free.

What is Acrobat Reader?

By Duff Johnson

"Adobe Acrobat Reader": was retired by Adobe in May, 2003 with the release of Adobe Reader 6.0. Where did it go?

The many varied uses of PDF

By Duff Johnson

Almost anything you can do with a piece of paper, you can do with a PDF. And with a PDF, you can do so much more. Here's a simple list of the many ways in which business and government put PDF to use, everyday.

Why send a PDF?

By Duff Johnson

Too many people sending too many Word files makes for clogged networks and nasty surprises. Find out why PDF just beats the pants off of Word files when it comes to reliable delivery of an original document. If you used to fax or mail it, you'll want to PDF it.

"PDF Online 101" - A Crash Course

By Duff Johnson

It's easy to make sure a PDF is well groomed before you post it to the web or email it for all to see. In this article, we tell you want to check for.

PDF In-Depth Free Product Trials Ubiquitous PDF

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Debenu PDF Tools Pro

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Five visions of a PDF Day

In the world of PDFs or as we like to say Planet (of) PDF, a year isn't a real PDF year without an intense few days of industry knowledge sharing.

May 15, 2018
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Debenu PDF Aerialist

The ultimate plug-in for Adobe Acrobat. Advanced splitting, merging, stamping, bookmarking, and link control. Take Acrobat to the next level.


Adding a PDF Stamp Comment

OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.