Microsoft Excel's Data Validation tool lets you add a drop-down list to a cell based on existing data in a column. However, how this works depends on whether the source data is part of a formatted ...

Have you ever carefully crafted a formula in Excel, only to watch it unravel into chaos the moment you copy it across columns? It’s a maddening quirk of Excel tables—structured references that seem to ...

Related coverage from How To Do Everything: Tech: Meira Gebel is a freelance reporter based in Portland, Oregon. She writes about business, culture, and technology for Insider. Her work has been ...