I have created 2 custom invoice designs (one I need for some special client who needs certain fields on his invoice) and am trying to figure out how designs work.
What I have done so far is to apply one design to all recurring invoices for all but one client. Then I applied the second custom design to the recurring invoice of this special needs customer.
And yet when the recurring invoices trigger and invoices get generated and sent out, all invoices end up using the design specified under: settings => invoice design => invoice design.
Can someone please clarify what I am doing wrong and how to get 1 recurring invoice to use a different design than all the others?