1. How to add/pass the Product Options App's line_item properties in Order Confirmation email.Please follow the following steps to pass the line_item properties in the Shopify Order Confirmation email. Navigate to the Settings page of your Shopify store and click on the Notifications. Click on the Order Confirmation option.In the Order Confirmation email template search for product.title variable and place the following code after the {% end if %} condition. {% assign property_size = line.properties | size %} {% if property_size > 0 %} {% for p in line.properties %} {% unless p.last == blank %} {{ p.first }}: {% if p.last contains '/uploads/' %} <span class= order-list__item-property >{{ p.last }} : {{p.last | split: '/' | last }}</span> {% else %} {{ p.last }} {% endif %} <br> {% endunless %} {% endfor %}{% endif %}See the attached image for your reference below Save the email template.