Add Custom User Fields
During the checkout process, customers will be required to enter their name, email, and password. You can choose to add up to three (3) custom user fields to collect additional information from customers.
NOTE: Custom user fields cannot be mandatory. All custom user fields are optional.
To create a new User Field:
-Navigate to the Settings tab and select User Fields
-Click on Show Custom Field
-Fill in the Field Title
-Click Save Changes
-Custom user fields will appear on the checkout page with under customer information
-Custom user field information will appear on the Summary tab of the detailed customer view