I have a MacPro (desktop) connected through DP and a MacBook Pro connected through USB Type-C.

I keep the MacBook lid open so I can use the camera and also, if I have selected the DP input, to see what is going on on the laptop.

However, the laptop still "sees" the Dell screen and therefore uses the now non-visible screen estate. Basically, the setup is unusable because I can't see where my application windows are.

Is there a way to configure this behavior? Basically I would expect that when I switch input I mimic the physical act of removing the cable from one of the devices and plug it back into the other device.

Thanks