During the process of taking Payment of a Sale, you have options to select multiple types of payments at the same time for your current Transaction.
if you accidentally chose a wrong payment method or if there was another reason, you can remove a that type of a payment during on a Sale in progress by clicking on the 'x' button that is located next to the payment amount and change it with another variant.
after you have finished with the changes Click on "done", to complete the transaction with the type of payments that you wanted.
***Note that you can add your custom payment to a certain Register by navigating to Settings>>Sales Section>>Register Payment Methods>> click on 'Add New' button and then fill in the Payment Name, Payment Display Name of the Payment method finally Save it, then go through the Register that you want to add your new custom Payment and you're all set now.
Settings That Affect This
- Settings>> Register tab>> in the options as you look through the list of valid payment types for a given register. Some payment types can be disabled for instance if a certain register does not take credit cards or cash.