In the Marketer account, click Templates > Create New Template. A pop-up will appear asking if you would like to use the Legacy Template Builder or Beta Template Builder.
Click Beta Template Builder to create a template in the new Template Builder environment. You will be brought to the template creation page below:
In this pop up you will set a Template Title and Default Subject,
Restrict Access to the template as well as specify how the template is intended to be sent. For the time being, we recommend the use of the "Sent by agents" option.
And choose a starter template to build from.
Click Save to start working on your new template!