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The next time you distribute a PDF (by email, posting on the Web, etc.), think first about what it contains. Anything sensitive? Or are there parts of the PDF -- a logo sketch or one of your photographs, for example -- that you don't want floating around on the Internet?

Using Adobe Acrobat, you can apply a simple PDF password that prevents people from copying text and graphics or from printing. And when called for, you can even require a password to open your file.

In this short, easy-to-follow video tutorial, you'll learn how to protect your files from tampering. Click on the image below to open a separate window with the video.