I was using Ubuntu 20.04 on my second with a different resolution compared to my main one. After my work was completed, I suspended the virtual machine and closed the app. And now launched the app to continue my work and I changed the screen resolution inside the guest OS to be compatible with my first screen (because I don't have a second one now). All the UI elements scaled ok, except the mouse pointer. It remain s as small as it was (the second monitor was bigger). I've tried relaunching the virtual machine and the Parallels app itself, but it had no result.