If you click on the settings button (upper right corner), you’ll see the message you are sending to your customers. You can change/customize your message at any time.
When you write, you can use smart tags. These are personalized variables specific for each customer's order. To add one, just click on the smart tag and you’ll see that the tag is added to your text.
Examples of smart tags:
First name = Customers first name
Shipping city = The city the order will be sent to
Order date = Date of order creation
Day of week = Today's day of week