Printing emails

Hi there, I see this plugin adds the custom fields to emails and that is GREAT!

But I need to print orders, and I found some plugins that send you a Printable PDF with the order details. The thing is, the custom fields I added in checkout won’t appear in the PDF.

Is there a way to print emails or the orders including fields added by this plugin?

https://www.ads-software.com/plugins/woocommerce-poor-guys-swiss-knife/