Dell S2240T 21.5 Multi-Touch Monitor with LED - Manual (Page 30)

30 | Operating the Monitor
Main Menu for digital (HDMI) input
NOTE: Auto Adjust is only available when you use the analog (VGA) connector.
2. Press the and buttons to move between the setting options. As you move
from one icon to another, the option name is highlighted. See the following table
for a complete list of all the options available for the monitor.
3. Press the button once to activate the highlighted option.
4. Press and button to select the desired parameter.
5. Press to enter the slide bar and then use the and buttons, according
to the indicators on the menu, to make your changes.
6. Select the button to return to the main menu