Dell UltraSharp 49 U4924DW 49" WQHD Ultrawide Curved Monitor - Manual (Page 77)

Operating the monitor
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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 your monitor parameters (brightness, color
balance, and etc.) to be adjustable using 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.