Automatic Invoice Number when using recurring sales invoice

[Patch]

I suspect this is part of Missing options on Recurring Sales Invoices

Given

Recurring Payslips Auto Reference Number Not Generated

This issue is bigger than just reference number. There is another topic under bugs category. See: Basically, all fields on regular transactions should be available in recurring transactions. When this is fixed, this will be resolved as a result. I’m working on it.

With a generalized implementation requiring changes in the current recurring items

Ideas - Recurring Sales/Purchase Orders

Proforma invoice should be entered under Sales Quotes tab. As far as making other types of transactions recurring, I will need to reshuffle how it shows under Settings tab. There are already 4 icons related to recurring transactions.