Dell E1713S User Manual page 32

This feature helps reduce minor cases of image retention.
LCD Conditioning
If an image appears to be stuck on the monitor, select LCD Conditioning to help eliminate any image retention. Using the LCD
Conditioning feature may take some time. LCD Conditioning feature cannot remove severe cases of image retention or burn-in.
NOTE:
The below warning message appears once user selects " Enable" LCD Conditioning.
Factory Reset Resets all OSD settings to the factory preset values.
Personalize Select this option allows you to set two shortcut button.
Use LCD Conditioning only when you experience a problem with image retention.