Under the Data Tools group, click on the Data Validation option. Check the Data Validation value under the Settings tab. If the values entered there are incorrect, edit them and click OK.

Figure A We’ll add a data validation control to this sheet. Click the Data tab, and then, click Data Validation in the Data Tools group. In the resulting dialog, choose List from the Allow dropdown.

Click the Data tab and select Data Validation in the Data Tools group. A Data Validation dialog box will appear. Under Allow, click the drop-down arrow and select List from the drop-down list.

Base a Data Validation dropdown on the Region values. Now, let’s use UNIQUE () to create a unique list of region values and then base a data validation dropdown on that list.

Go to Data on the Ribbon, and in the Data Tools group, choose Data Validation. The Data Validation window that pops up allows you to set your criteria in many ways. For our example, choose Whole ...

Select the "Data" tab, click "Data Validation" and choose "Data Validation." Choose "List" in the Allow section. Click inside the "Source" box and select the cells containing the list you created.

Select the cell or cells where you want to enforce data validation rules. Click the "Data" tab in the ribbon menu, then click "Data Validation." ...

You can easily create a drop-down list in Excel to limit the values that can be entered in a column. This data validation helps prevent mistakes, such as misspellings. Drop-down lists are also ...