If you wish to access more customization options, you can edit your email code. Here's how you can do that:
From the sidebar menu choose Personalization.
From the Notification section select Email notification.
Click on the Personalization button for your selected template.
Click on the 3 dots on the top bar to see the Edit code option.
You're now able to edit the code however you'd like.
Shopify Liquid filters can be used when editing templates. For a list of the filters available to you, refer to this article.