1. Select the target cell(s)
Click the cell or range where you want to insert the drop-down list in your Excel file.
2. Open the Data Validation menu
In the Excel toolbar, click Data, then choose Validation from the dropdown menu.
3. Choose “List” as the validation type
In the Data Validation window, find the Allow field and select List.
4. Enter your list source
In the Source field, either type comma-separated items like Yes,No,Maybe (no spaces), or reference a range like =A2:A13.
5. Confirm your settings
Click OK to save your Data Validation rule and enable the drop-down list.
6. Use the drop-down
Your drop-down list is now active in the selected cell(s), allowing users to choose from your predefined options.