I use a 2560x1600 screen and scaled at 200%, cursor size=18

I use Wayland session.

I set the "Apply Plasma Settings" in systemsettings >> Colors & Themes >> Login Screen (SDDM)

But the SDDM still use 100% scaling which is too small for me.

Then I Make a file called hidpi.conf

Put this in the file.
```
[General]
GreeterEnvironment=QT_SCREEN_SCALE_FACTORS=2,QT_FONT_DPI=192

[Wayland]
EnableHiDPI=true

[X11]
EnableHiDPI=true
ServerArguments=-nolisten tcp -dpi 192
```
Put the file in /etc/sddm.conf.d/

Now the screen has scaled 200% but the cursor is still too small