Dell S2240T 21.5 Multi-Touch Monitor with LED - Manual (Page 37)

Operating the Monitor | 37
Menu
Transparency
Select this option to change the menu transparency by pressing the
and buttons (Minimum: 0 ~ Maximum: 100).
Menu Timer OSD Hold Time: sets the length of time the OSD will remain active after
the last time you pressed a button.
Use or to adjust the slider in 1 second increments, from 5 to
60 seconds.
Menu Lock Controls user access to adjustments. When Lock is selected, no user
adjustments are allowed. All buttons are locked.
NOTE:
Lock function – Either soft lock (through the OSD menu) or hard lock
(press and hold the button above the power button for 10 seconds)
Unlock function– Only hard unlock (press and hold the button above
the power button for 10 seconds)
Energy Smart To turn on or off dynamic dimming.
The dynamic dimming feature automatically reduces the screen's
brightness level when the displayed image contains a high proportion
of bright areas.
DDC/CI DDC/CI (Display Data Channel/Command Interface) allows your
monitor parameters (brightness, color balance, and etc.) to be
adjustable via the software on your computer.
You can disable this feature by selecting Disable.
Enable this feature for best user experience and optimum performance
of your monitor.