Overview:
If you have Custom Options on your products from another app, we can likely have them added to the quote. If they are stored as Line Item Properties, then you can edit your templates to show these items by following the tutorial below:
Tutorial:
Go into the Settings page of our app, and edit your email template by clicking the "templates" and then select "Customer Quote Email"
Once you are editing the template, search through the HTML to find this line:
{{ line_item.title }}
Immediately after the title add the following snippet
{% if line_item.properties %}
{% for prop in line_item.properties %}
{% unless prop.key.first == '_' %}
<div>
{{prop.key}}: {{prop.value}}
</div>
{% endunless %}
{% endfor %}
{% endif %}
Your template should now look something like this: