If you need to adjust a tip after a sale has settled, you have the option to do it from the card reader. (Keep in mind that this will not be reported on the POS.)

1. On the card reader screen tap the Spin Bypass button at the bottom of the screen 

2. Enter the manager password

3. Tap the screen

4. Tap Sale

5. Enter the Tip Amount

6. Run the transaction using the credit card by swiping, tapping or chip

1. If the card is not present hold the screen for 3 seconds and enter the card #

7. Once all the tips have been entered, tap the Spin Bypass button again