This section of your admin console allows you to choose a customizable template or to create a new one. It is divided into two areas:
List
The menu contains three dropdown menus: choose the template that fits your needs according to the kind of message you want to send. You can choose the type of message (newsletter, Rss, or retrieve a customized template), the color and the number of sections.
Of course, once you select a template, you will be able to fully edit it in the message editor.
New
Create a new template using the editor. The editor resembles that of a common word processor; the button 
will help you get the meaning of every button.
...
If you are using a template for RSS feeds, you can use the RSS tags mentioned in the documentation shown in the admin console (click on the link "How to insert RSS feeds in a message" for further instructions on how to create it.in the advanced section).
