Checkbox field can be used in case you want the user to select one from the given
There is no option to make this mandatory since it is a checkbox.
In order to add a checkbox field, you can:
1 Click on “Settings” on the side navigation bar
2 Select “General” from the option
3 Once done, click on the “User” tab.
4. Click on the “Add Custom Field” button
5. Enter the “Name” or title of the custom field
6. Select ‘Checkbox’ from the drop-down of a custom field that you intend to add
Check the configurations that you wish to enable for the custom fields added. You can select more than one option here.
7. Visible on reports - This will show the details of the custom fields on reports as well
8. Self editable - This will enable users to edit this info from their profile
9. Include in sign-up form - Checking this box will add the custom field in the sign-up page as well
10. Save once done