Is it possible to edit the new lightning email templates?  I have figured out how to create them, but I cannot find them to edit them.  When I click on "Setup" there seems to be an "Email" option that looks promising.  However, when I click on that (and sometimes when I don't) the program crashes and sends me to the login.
Help please!

Is it possible to edit the email templates which we define in Salesforce. I want to edit the HTML Email template and send further.
Please suggest how to achieve this.