In the Receipt Settings area of the Payment & Credit tab, you can specify the default payment settings for the selected customer. By default, the Use payment method and cash account from last saved receipt box is checked. When checked, the Payment Method and Cash Account fields default to those used on the last saved receipt.
If you want to customize the receipt settings for the selected customer, clear the Use payment method and cash account from last saved receipt check box and select the Payment Method and Cash Account you want to use as the default for this customer. The next time you create a receipt for this customer, or receive a payment through the Sales/Invoicing window, the customized receipt settings will appear.