In notification settings, you can set notification mail subject and message format for your customers. 
 

Go to GET STARTED -> Manager Settings  OR 

Sidebar Menu -> Settings 

Click on "VIEW" in the block "Notification Settings" for notification settings. 

    On click "VIEW" in Notification Settings block, redirect to your notification settings page as shown below 

1. Click which notification mail you want to send from left side menu in notifications. 

2. Enable/Disable notifications to send customers 

3. Enter the relevant subject for the notification 

4. Enter the relevant  message for the notification 

5. click save to apply notification settings 

Here ##shop_name##, ##customer_name##, ##credit## variables which are replaced dynamically.