As a Catalog admin, if the Storefront Theme Editor has been enabled for your account, you can create custom email branding for your Catalog and subcatalogs using HTML.
If custom email branding is not created for a Subcatalog, it inherits the parent catalog email branding.
Open Admin
Click the User Name drop-down menu [1]. Then, click the Admin link [2].
Open Catalogs
Click the Catalogs tab.
Open Catalog
Click the catalog name link.
Open Customizations
Click the Customizations tab.
Customize Email Branding
Click the Email Branding link [1].
To customize the email header, enter HTML in the Custom Layout HTML Header field [2].
To customize the email footer, enter HTML in the Custom Layout HTML Footer field [3].
Click the Save button [4].
