This is a Pathfinder Pro feature. It assumes you have HTML skills.
For companies who wish to make their own HTML templates without using our smart email editor, you can use this screen.
To design your own email using pure html, select the HTML Only template.
Name your email
Enter the subject line, from name, from email address and save settings
Then, you can enter the code in the right hand side and see the output on the left hand side of the screen.
Save as normal, sent test email and save as template to reuse in future.