We use the "Transfer data to" option to copy info from a quote to an invoice. We really need to reference the original quote number (for us, uses the Document Sequence Number & some HubSpot variables) to the invoice so the customer knows what quotation they are paying for with the invoice. It would be great to be able to define a "transferable element" as part of a template... i.e. be able to define within the template that if the document is created from a "Transfer data to" option, populate a variable using that info.