Dell S2240T 21.5 Multi-Touch Monitor with LED - Manual (Page 38)

38 | Operating the Monitor
NOTE: This monitor has a built-in feature to automatically calibrate the brightness
to compensate for LED aging.
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.
Factory Reset Reset all OSD settings to the factory preset values.
Personalize Users can choose a feature from Preset Modes, Brightness/Contrast,
Auto Adjust, Input Source, or Aspect Ratio and set it as a shortcut key.