How to create custom email template in magento 2
Login in to Magento Admin
Go to Marketing -> Communications -> Email templates form Magento Navigation.
Go to Marketing Email Templates
Now, click on Add New Template.
Add New Email Template
If you want to load default template than Select template and click on load template. After click in Template Information default content will be load.
Load Default Email Templates
You can add content on Template Content section and also give custom CSS that you can write on Template Styles.
Modified And Create New email Template
You can see preview of your Email template by click on Preview Template.
Email Template Preview
And after all perfect Save Template.
For change Default Welcome Email (New customer)
Go to Stores -> configuration from Magento Navigation.
Go to Stores Configuration from Navigation
After that go to Customers -> Customer Configuration in that unchecked Use system value of Default Welcome Email and select your created custom template from drop box.
Set New Customer Email template to New Custom email Template
Save Configuration by click on Save Config button.
