As you may be aware, Excel’s Conditional Formatting feature allows you to identify duplicates in a column. This technique requires some tech savvy in certain versions of Excel, but only a couple of mouse clicks in Excel 2007 and later. A reader named Chris asked me if it’s possible to extend this functionality to not only identify duplicates in a single column, but further highlight the adjacent cells in the same row. In this article I’ll first cover show how to identify duplicate values in a single column, and then show how to extend the functionality in the fashion Chris is seeking. I’ll do so first for Excel 2007 and later, but will then provide alternate instructions for Excel 2003 and Excel 2011 for Mac.
About David Ringstrom, CPA
David H. Ringstrom, CPA, is an author and nationally recognized instructor who teaches scores of webinars each year. His Excel courses are based on over 25 years of consulting and teaching experience. His mantra is “Either you work Excel, or it works you.” David offers spreadsheet and database consulting services nationwide.