As customers make purchases in your store, Magento sends — based on your configurations — a number of e-mails to notify customers about their purchases. There are also e-mails for recovering passwords, creating accounts and more.
Magento installs some basic templates for all these transactional e-mails. You can create new e-mail templates to use for your stores that reflect your branding and messaging. In Magento 2, this is quite easy to do.
When you first go to Marketing | Email Templates, you'll see an empty list. That's normal. The base templates installed with Magento will not appear in this list — but they are there, nonetheless. E-mail templates can also be included in Magento themes added to your installation. These will also not show in the list, but will be available for customization.
The process of customizing e-mail templates is:
Once you create your new e-mail template, you can assign it for use as sales e-mails, customer account e-mails, and so on.
You can create new e-mail templates for the following purposes:
As you can see, Magento has quite a number of e-mails. The items in this list with an asterisk (*) are e-mails that are not sent to your customers, but, rather, sent to you or someone you designate. These e-mails are for alerting your team when something doesn't quite go right.
There are also two additional templates that are used to create the headers and footers for your e-mails. In other words, you can manage the top and bottom of your e-mails without having to modify every single e-mail if, for example, you want to change your logo or phone number.
To illustrate how to do this, let's create a new e-mail template for our sportswear store. We will begin by modifying the header and footer for our sportswear store, then create a new New Order e-mail template.
On the Email Templates panel, click on Add New Template. At the top of the New Template panel, you'll see an area titled Load default template. Here, you can select the base template — or a template provided by a theme — and load it into the New Template panel for modification.

For our new header, select Header and click on Load Template. This will load the base header template into our New Template form.

Let's first review the fields shown on this screen:
Once we have modified the header to our liking, we can save it by clicking Save Template. If we look at our list of e-mail templates, we now have the one template listed.

If we click on the template and view its detail, we can see that it has no Currently Used For field, as it has not been assigned to a particular website or store. Once we have created our sportswear footer (it is not necessarily required to create both to be able to create and assign only a header or footer), we can now assign these to our sportswear website so that they appear for each store view.

We have now assigned our new e-mail header and footer to all outgoing e-mails related to the sportswear stores. If you view the detail for your header and footer e-mail templates, they will now display a Currently Used For value.

Now that we have created our special header and footer, we can create our new order email for our sportswear customers.
Thanks for Your {{var store.getFrontendName()}} Order!As you can see, the subject contains a Magento variable that will dynamically include the name of the store. Since we name our sportswear stores Sportswear English View, Sportswear French View, and Sportswear German View, we may not want to use the dynamic store view name, as these don't sound particularly consumer-friendly.
For our example, we would prefer to use Thanks for Your Acmes Sportswear Order!
As with the header and footer, we will now assign this e-mail to the appropriate sales e-mail:
We have now created a modified new order template for our logged-in purchasers and assigned it for our sportswear stores.