Signup Options tab allows you to change signup options on the account page,
whether you would like to be notified of newsletter sign up, and what the
customer sees when they subscribe to the newsletter.
Show Newsletter Signup:
Displays or hides the newsletter option from
appearing on the account page.
Notify Shop Admin:
Notify shop admin when a subscription is submitted.
Edit Confirmation Notice:
Edit the confirmation notice people receive when
they subscribe to the newsletter.