Occasionally a client will make a payment which exceeds his outstanding balance. Studiometry remembers such an overpayment and will offer to apply it to the next invoice created, but there is no indication anywhere in Studiometry that there is a credit balance until another invoice is created. To provide a viewable/printable record of an overpayment, it is convenient to create a retainer for the client, apply the overpayment to the retainer, and then pay the current balance from the retainer. This provides a record of the transaction in the client's retainer tab.
However, to accomplish these steps it currently requires going to multiple places to create the retainer, apply the payment to the retainer, and then pay the current balance from retainer. A step-saving feature would be adding the Use Retainer for this Client checkbox to the Edit Payment window so that the retainer can created at the same time and place that the payment is actually being recorded.
