In your form, click on the question you want to add a dropdown list to or add a new question by clicking the plus sign in the floating menu on the right. Click the box in the upper right corner of the question field. Then select Dropdown. Now you can add items for your dropdown list by clicking Add option.
Insert a combo box or a drop-down list Go to Developer > Combo Box Content Control or Drop-Down List Content Control . Select the content control, and then select Properties. To create a list of choices, select Add under Drop-Down List Properties. Type a choice in Display Name, such as Yes, No, or Maybe.
Inside your form either add a new form field by clicking on the plus sign to the right or modify an existing form field by clicking on the box in the upper right corner of the question field. After clicking on the box, choose the dropdown option.
Working with your drop-down list Select the cells that have the drop-down list. Go to Data > Data Validation. On the Settings tab, click in the Source box. Then do one of the following: If the Source box contains drop-down entries separated by commas, then type new entries or remove ones you don't need.