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 ...

Block bad data, duplicates, and incorrect dates with these custom rules.

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 ...

Q. I am trying to create a formula in our accounting system, but I keep getting errors. What can I do to get the formula to work? A. All Excel users know how powerful formulas are, but sometimes it ...

One option for sharing reports with your team is to simply rattle off numbers. Think something like this: "We allocated 10% of operating budget to maintenance, 15% to hardware upgrades, 18% to ...

While Microsoft Excel is one of the most powerful spreadsheet applications, it’s also the most intimidating tool in the Microsoft Office suite. If you’ve never used Excel before or are just a bit ...