Please create the option for users to customize their invoices or allow us to create an invoice template to some extent.

We like to add a notice that customers will pay a 3% fee (when paying through our in-store POS) as well as a signature line and an area to mark if the invoice has been paid or not. We also like to add the customer address to the order.

If we can modify the invoice via a template, and add these things to the invoice, that would be great!