If I have the laptop plugged into the monitor the laptop has to be open --- if I clamshell it ... all hell breaks loose on the display, shows 100s of tiny copies shrinking into the bottom left. Is this how the toll has to be used -- with a mirrored screen?
I just want want to present in Teams with my 57 inch monitor but want it working as normal just the smaller view -- or I would love the screen cap that has some virtual space in the centre and I can move anything there.

If I have the laptop plugged into the monitor the laptop has to be open --- if I clamshell it ... all hell breaks loose on the display, shows 100s of tiny copies shrinking into the bottom left. Is this how the toll has to be used -- with a mirrored screen?
I just want want to present in Teams with my 57 inch monitor but want it working as normal just the smaller view -- or I would love the screen cap that has some virtual space in the centre and I can move anything there.