Learn how to create a drop-down list using Data Validation in Excel. Data Validation limits the type of data that can be entered into a cell.

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.

Duplicate entries may be valid -- but when they aren't, they can derail your summaries and totals. Use Excel's Validation feature to reject duplicate entries.

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