Dell IN1940MW Display - Manual (Page 36)

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.
LCD Conditioning Helps reduce minor cases of image retention. Depending on the degree of image retention, the program may take some time to run. You can
enable this feature by selecting "Enable".