Dell C2722DE 27" 16:9 IPS Video Conferencing Monitor - Manual (Page 90)

90 | Operating the monitor
2. When connecting HDMI + USB-B to computer 1 and USB Type-C to computer
2:
USB Type-C
1 3
2
2 HDMI
1
USB-B
3
NOTE: The USB Type-C connection currently supports video and data
transfer.
Ensure USB Selection for HDMI is set to USB-B .
Exit
24/27/34 Monitor
Input Source
Color
Brightness/Contrast
Display
PIP/PBP
Personalize
Others
Menu
USB
Audio
DP assign to USB-B
HDMI assign to USB-B
NOTE: As the USB Type-C port supports the DisplayPort Alternate Mode,
there is no need to set USB Selection for USB Type-C.
NOTE: When connecting to different video input sources not shown
above, follow the same method to make correct settings for USB Selection
to pair the ports.