Dell U2422H 23.8" 16:9 IPS Monitor - Manual (Page 71)

Operating the Monitor
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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
Off . 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
On .