Color management is an important section that whole books have been written about. Adobe® Photoshop® Lightroom™ is designed to be easy to use however, so you really don’t have to read a book about color management in order to use it well. One thing that I do recommend is that you ignore advice that makes you feel incompetent because you don’t fully understand color management—you don’t have to. Color management here is simply the way Lightroom communicates how it sees a photo to the printer.
Immediately to the right of Color Management is a pattern of two up bracket arrows. Click them to turn on and off the warning seen below Rendering Intent in Figure 1.

Figure 1: Click the double arrows to the right of Color Management to enable to disable the "Managed by Printer" error.
To follow along with this article, you will need the following software:
Some knowledge of working with Photoshop Lightroom
Rob Sheppard is a professional photographer based in Los Angeles, and author of "Adobe Photoshop Lightroom for Digital Photographers Only," "National Geographic Field Guide to Digital Photography," "The Magic of Digital Nature Photography," and other titles. He is also the editor-at-large for Outdoor Photographer magazine, and regularly conducts workshops around the country to help photographers master digital techniques. His website is at www.robsheppardphoto.com.
Excerpted from "Adobe Photoshop Lightroom for Digital Photographers Only," by Rob Sheppard. Copyright© 2007 Wiley Publishing, Inc. Used with permission of Wiley Publishing, Inc. To purchase the full retail version of this book, visit www.wiley.com.