We upgraded our Invoice format to include a tear-off portion on the lower 1/3 of the page.
The address at the top of the page match up with a #10 double window envelope and the address in the remittance portion matches up with a #9 double window envelope.
Your custom message still appears on the document, it is now located above the Billing/Service Address.
Bulk printing and emailing your invoices can be completed from the Invoice List page.
Next up: Remittance coupons on Customer Statements, an Income Report, and Payment Status options (open/deposited) for accurate reporting and account reconciliation.