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 ...

If your Excel lists repeats values and you need help finding changes, try this easy conditional format. One of the most frequent requests I receive from readers is how to highlight list values when ...

Microsoft Excel 2010 stores data within cells, which are simply segregated pieces of the spreadsheet that Excel can then reference to work with the value in the cells. Since not every ...

Select winners in Excel using classic INDEX formulas or modern CHOOSEROWS and TAKE combinations.

You can't use a SUM() function to sum a filtered list, unless you intend to evaluate hidden and unhidden values. Here's how to sum only the values that meet your filter's criteria. Filters are a ...