About the Author
Dave Ludwig is a content developer at Microsoft who creates articles, visual aids, and videos for Excel. Dave's first job in software was teaching banking software to accountants. From there, he moved on to graphical software where he taught Photoshop and Illustrator to Adobe technical support staff. His first job for Microsoft was at MSN Sidewalk, where he trained employees on in-house publishing tools. Now he works on Office as a content developer, with a focus on Excel. He enjoys teaching people to be more productive so that they can succeed both personally and professionally.