Before you can add a custom field, you'll first need to create custom field groups. To create a custom field group, you'll click on Settings from your main navigation, then click on the Custom Fields cell.
From the custom fields screen, you'll click on the green Add button in the upper left and then click on the Custom Field Group button from the drop down list.
From this page, you'll create the title of the custom field group (E.g. Product Additional Info). Once you've created the name, click on the green Save Custom Field Group button below the title field.
After you click on this button it will take you to the Custom Fields page where you can see a newly created group on the list below. You can edit the custom field group by clicking on the pencil icon at the end of the row under the Actions column.
Now that you have create a custom field group, you can proceed and add a new custom field.
If you have any questions about custom fields please reach out to our team.