Option to "Pay in Full" or "Make Payments"

Is there a way to offer the option to either pay in full now or make payments? Often I have guests contact me after booking, before their second payment is scheduled to run, asking if there is a way to go ahead and pay the balance they owe. They generally prefer to pay up front, but I love being able to offer the payment option and so any help or guidance in the matter would be great!!

Thanks in an advance, 

Lacey

If a guest writes in and wants to pay early, you most likely already have their card on file from the first payment, so, you can just go to the Transactions tab and collect a payment of the remaining balance right then and there.  When the normally scheduled time arrives, there won't be a balance due, so no additional payment will be taken.