Dell UltraSharp 34 User Manual page 60

Activate the computer and the monitor to gain access to the OSD.
NOTE: The message may be slightly different according to the
connected input signal.
If either USB Type-C, DisplayPort, or HDMI input is selected and the corresponding
cable is not connected, a floating dialog box as shown below appears.
NOTE: The message may be slightly different according to the
connected input signal.
When the monitor is under DP/HDMI input and a USB Type-C cable is connected to
a notebook that supports DP Alternate Mode, if
enabled, the following message appears:
When Factory Reset is selected, the following message appears:
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60 Operating the monitor
Auto Select for USB-C 90W is