How to use "On hold" option in customer installment plan and discount window

Hi,

I ‘ve found the information that On hold function is used to Hold Installments for Payment but only for Supplier Installments.  You can hold installment(s) using the Manual Supplier Invoice window and next Installment Plan and Discounts or using the Authorize Invoices for Payment window. Those installments will be On hold for the Payment proposal.

I do not see the needs to use On hold for Customer installment - when it will be payed it should be entered to the system as payment for the installment.

Best Regards,

Pawel