In particular, while the name doesn’t obviously suggest it, the “pay multiple invoices or assign to a supplier account” option supports partial payments and overpayments on a single invoice as well as a single payment covering multiple invoices. When you select the supplier it will show you all their outstanding invoices (in this case one) in date order, and you can choose which to apply the payment to. If the payment is less than the outstanding balance on the invoice it will end up part paid, if the payment is more than the invoice you’ll have the option to hold the excess on the supplier’s account to redeem against future invoices.