The initial situation: MacOS Monterey is running on the base machine. A 4K screen (40 inch) with a basic resolution of 3840x2160 is connected, but this has been reduced to 2560x1440 via a system setting. Another macOS Mojave was installed in a VM using Parallels Desktop 17. The display available within this VM is limited to 1024x768 - this is really poor and totally unacceptable. The system settings of the emulated macOS do not offer any other options. Hopefully there will be an update from Parallels soon.