Dell UltraSharp UP3218K User Manual page 28

Front-Panel Button
Use the buttons on the front of the monitor to adjust the image settings.
Front Panel Button
1
Up
2
OK
3
Back
28 | Operating the Monitor
Description
Use the Up (increase) and Down (decrease) keys to adjust
items in the OSD menu.
Down
Use the OK button to confirm your selection.
Use the Back button to go back to the previous menu.