How do I set a custom field as required ?
You can easily set a custom field as a required field by following bellow steps.
Note -If you have not added custom field, please read the following article.
Go to the Checkout Extension Pro and click on checkout page button.
Then click on Custom Field Manage button.
Then select any custom field and scroll down and check "Required Field" checkbox.
Note - You can also set error message when field will be blank after click on buy button.
Finally save your changes.