In case it helps anyone: I remember when I upgraded to Catalina, macOS wouldn’t allow me to vertically rotate my two external displays anymore (as per my pre-u

In case it helps anyone: I remember when I upgraded to Catalina, macOS wouldn’t allow me to vertically rotate my two external displays anymore (as per my pre-upgrade setup). Then I remembered Apple introduced Sidecar, which I decided to turn off (using ‘defaults’); issue gone.