How to Fill Colors in a List in Excel. With Microsoft Excel, you can simplify data entry by adding a drop-down list to a cell, allowing users to pick an option from the list instead of entering data.

Prevent duplicates before they happen by combining a simple function with data validation.

A common use of data validation is to create a drop-down list. Use it to restrict the type of data that users enter into an Excel cell.

Excel’s data validation feature offers an efficient way to perform a variety of tasks. This collection of techniques demonstrates several handy ways to put data validation to work.