Hello!
Communication with the end consumer is important, and Order notifications are the main part of it.
This idea came up when we noticed the main Store Logo is always sent out as an Attachment file included in order notifications.
Having checked it closer we came to the conclusion there's likely no way to remove it from the order notifications at all.
Related files seem to be:
core/lib/mail.php
storefront/view/default_html5/template/mail/order_confirm.tpl
The feature would allow to control such attachments (on/off, specific file, etc), and the email body contents (text, formatting etc).
The notification template controls could be mapped to the already existing mail control items,
such System > Settings > Mail, or Sales > Mail .
Thank you