You can specify the Payment Method by Email for the Product List Element, Template, and Payment Button.
Sent To Emails
The Payment Method By Email allows you to send the Order to all emails specified in the Send To property without payment.

Payment Popup Form
You can process Orders in the Payment Popup without actually paying for them, and it will be marked as Unpaid in the Orders.

Edit Texts For Payment Popups Email
Edit the Labels and Placeholders for the Email option in the Payment Popup.
