To input or adjust tips on credit card sales, you will need to access the SETTLE TRANSACTION function.
Starting from main screen navigate to > MENU > SETTLE TRANS
You will see all unsettled credit card ticket sales.
Locate each ticket and input tips.
Tip adjustment number pad should automatically pop-up when you select the ticket you are trying to adjust.
Press done and your tickets will have tips added in. Press close to turn off SETTLE TRANS screen.
To adjust tips, press tip amount underneath the GRATUITY.