• This modpack, if my screen resolution scaling setting is greater than 100%, the game's window UI shift, it doesn't recognize my resolution scaling (150%), but zooms along with it, so that my game screen is so large that I can only see the top left corner of the game (full screen). If windowed runs, it will run to the bottom right corner of the screen every time it runs.
• If I turn the resolution back to 100%, it's fine. But my notebook is 2.5k resolution. I need the default resolution scaling to be
  150%.
• What am I going to do ╯︿╰

• Full screen
  
  
  

• window 1920x1080
  

Find the javaw.exe that the game is using. Right click -> "Properties" -> "Compatibility" -> "Change high DPI settings" Then enable "Override high DPI scaling behaviour"

Looks like an issue with Java 1.8, thanks, has been solved

• Well, I know what the problem is. This seems to be a common bug in Minecraft 1.12.2. In other words, it is possible that versions 1.12.2 or less have this problem. I don't know at the moment, I only tried 1.12.2. The high version doesn't seem to have this problem anymore.

Find the javaw.exe that the game is using.
Right click -> "Properties" -> "Compatibility" -> "Change high DPI settings"
Then enable "Override high DPI scaling behaviour"