I have a Samsung wide screen monitor that worked with 2017 MacBook Air with intel running latest OS on beta that's available - Monterrey 12.7.4 - until I download software to share with a government entity. After removing that share screen software, I can no longer get a resolution about 1920x1080, which results in my monitor display looking stretched. I've reinstalled OS three times, set to monitor to defaults two times, and still nothing.
How do I add resolution size about 1920-x1080?