Related Questions:
Change the methods of payment my clients can use
Can I customize my payment types?
Add new payment method
Procedure:
Payment Types are located within Organization Setup Values within Organization Settings. They can be managed by Admin Users or Chain Admins if you are connected to multiple Organizations.
Select Settings
Select Fields
Select Setup Values
Hover over Payment Types & Click Edit
From here you will be able to manage existing Payment Types, or Add a New Payment Type
