From the list of values select the transaction code to be used when posting an adjustment to the current transaction code. Adjustment transaction codes let you store and track updates to transactions (and linked transactions). For example, you can use them to track customer reimbursements, credit adjustments, corrections (including same day corrections), and rebates.
Display Code. (Available for transaction codes that are associated with Payment Types.) By default, the transaction code for a payment method appears in the Payment Method field on the Payment screen. If you wish to have a display code appear in the Payment Method field instead of the transaction code, you may enter the display code here. Up to 8 characters may be specified. Plus, a payment type button that is associated to this transaction code is displayed on the right side of the Payment screen that allows for an alternate way to choose the payment method for the payment. For example, if you want AX to appear in the Payment Method field when you select the American Express (transaction code 9010) payment method, enter AX in the Display Code field. By default, the Display Code field is blank and the transaction code will appear in the Payment Method field on the Payment screen.