Dell P3424WE User Manual page 68

Others Select this option to adjust the OSD settings, such as
DDC/CI, LCD Conditioning, and so on.
Display Info Displays the monitor's current settings.
DDC/CI DDC/CI (Display Data Channel/Command Interface)
allows you to adjust the monitor settings using
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.
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68 Operating the monitor