By default, your Order Printer Pro built-in templates won't include the customer's email address when the billing address details are collected. However, if you and your business find it helpful to always have the customer's email, you may easily add it to your documents by following the steps below:
Steps
1- Login to Order Printer Pro
2- On the "Manage templates" page, click "Edit template" on the template you would like to update.
3- In the "Code" section, find {% elsif customer != blank %}
4- Paste the following code lines above {% elsif customer != blank %}
{% if customer.email != blank %}
<br>
{{ customer.email }}
{% endif %}
Once done, you should see it on your customer billing details: