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".