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. From the ebook: ...

Microsoft Excel lets you create simple forms that your users can enter data. To save them time and make sure you get the information you need, you can create a drop-down box that limits the users to ...

Use Excel data validation to prevent duplicate values in a column Your email has been sent Prevent duplicates before they happen by combining a simple function with data validation. Excel has built-in ...