Quick Note: Microsoft Remote Desktop Connection Manager Windows overfit High DPI Screen
4K screen is getting popular in recent years. You may see some challenge for legacy applications. Such as "Microsoft Remote Desktop Connection Manager". It's stopped developed since 2014. But it's still a useful tool for server administrators. You may see the windows overfits screen on 4K display. The fix is: Go to properties of " RDCMan.exe " " Compatibility " tab " Change high DPI settings " Uncheck " Override high DPI scaling behavior ".