Can the header and footer of email template be updated?

Admin users may modify the header and footer of the email template from the user profile settings. Once modified by the admin, all the users of the tenant will get notification emails with the modified header and footer.  The admin will be able to reset the header and footer to the default.

Admin will also have a preview option such that the changes made to the header and footer will be visible as an email preview within the Admin panel.