To edit an existing email/SMS template, go to Home>Organization and click on the Email & SMS Templates tab.
The data fields for the selected template will be displayed:
Enter a title, subject, and email template (HTML tags can be used), and SMS template as desired. To select an image for SMS, click the Select Image button and select an image file. Once an image has been selected, click the Change button if you need to change it.
When you have completed editing the template, click the Save button at the top of the page on the right.