It's done on the USB and Input menus. See pages 80-82 of the user manual. I agree it’s not described in the most logical way but it definitely works! I ended up connecting my webcam to my laptop directly and not via the monitor because if I want to look something up on the DP connected computer during a Teams call on the Thunderbolt connected laptop, I'd lose my video connection as the monitor passed the webcam connection to USB-B!
MacBook Pro m1 max is primary computer. PC desktop is secondary computer.   Mac is connected to monitor via thunderbolt only.  PC is connected via DP and USB-B.    When setting up KVM on Mac, I get this window. [IMAGE] Which only gives USB-B option only for data. Which isn't even required since it's connected via thunderbolt. Which is wrong! When I set up KVM on the PC, if I select Thunderbolt, it only has thunderbolt option for data too. Which is correct. [IMAGE]   So the KVM doesn't work for me for when I switch to my Mac, the peripherals connected to the monitor does not work. Ccan someone fix this please.
U4021QW, KVM OSX setup is wrong