If you set up your list source as an Excel table, then all you need to do is add or remove items from the list, and Excel will automatically update any associated drop-downs for you.

The following example shows how to create a data validation condition to ensure that data typed into a text box control matches a specific value — in this case, the word Hello.

Use data validation rules to control the type of data or the values that users enter into a cell. One example of validation is a drop-down list (also called a drop-down box or drop-down menu). …

You can insert a drop-down list of valid entries (also called a drop-down menu or drop-down box) in Excel to make data entry easier, or to limit entries to certain items that you define.

To find the cells on the worksheet that have data validation, on the Home tab, in the Editing group, click Find & Select, and then click Data Validation. After you have found the cells that have …

To remove a drop-down list, click the cell with the list, then click Data > Data Validation, and then on the Settings tab, click Clear All, then OK. A drop-down list is also known as a drop-down …

You can use Microsoft Office Excel to create and edit connections to external data sources that are stored in a workbook or in a connection file. By using the Workbook Connections dialog …

Find Microsoft Excel help and learning resources. Explore how-to articles, guides, training videos, and tips to efficiently use Excel.

Use a custom list to sort or fill in a user-defined order. Excel provides day-of-the-week and month-of-the year built-in lists, but you can also create your own custom list.

Use AutoFilter or built-in comparison operators like "greater than" and "top 10" in Excel to show the data you want and hide the rest. Once you filter data in a range of cells or table, you can …