- Go to Assets > Email Template> New.
2. Select the type of email you want to create, a New Email Template or a New Segment Email.
3. On the new screen, select the “Code Mode” option. 
4. Click on “Builder”, here you can create/edit the template accordingly.
Note: – By switching to the Code Mode, you will be able to edit the content only in HTML code. Changing back to a theme will lose content.