The “Ignore blank” check box is checked by default. Make sure the “In-cell dropdown” box is checked. Enter =Age in the “Source” box (if you named your cell range something else, replace “Age” with that name). Now, we’re going to use the name we assigned to the range of cells containing the options for our drop-down list. On the Settings tab, select “List” from the Allow drop-down list (see, drop-down lists are everywhere!). In the Data Tools section of the Data tab, click the “Data Validation” button. Now, select the cell into which you want to add a drop-down list and click the “Data” tab.
