Modify the Shipping and Billing Information template
Modifying this template will allow you to add a checkbox for the newsletter subscription field.
To modify the Shipping and Billing Information template, preform the following:
- Edit the template.
In the Widget templates page, click the link representing the title of the Shipping and Billing Information template.
- Add a checkbox for the subscription field.
In the Edit template editor, locate the section below and include the new section, as demonstrated in the following example: