In message templates you can manage all templates of mail which are send to your customers, of course you are able to create own templates. If you want to add new message template you need to click button "Add new" in top-right corner of window.
Allowed message tokens - Here is list of all allowed message tokens which can be used in your new message template
Name - Name of your template
Is active - Defines if your template is active or not
BCC - Blind Carbon Copy
Subject - Subject of mail which will be send to your customers
Body - Body of your new mail
Email Account - Use specified email account
Send immediately - Send immediately after action
Delay send - Choose when this message will be sent
Attached static file - Attach file if necessary.