I can show you what it looks like for me on my Surface Pro 4. It seems your display library assumes that all screens have the same resolution. Also, moving the window to a low resolution screen does not help. It is using the wrong dpi on all screens if the primary monitor has high resolution.
HDPI support is under development.
It would really help the development if you could post a screenshot of your whole desktop while XDM is running.
I can show you what it looks like for me on my Surface Pro 4. It seems your display library assumes that all screens have the same resolution. Also, moving the window to a low resolution screen does not help. It is using the wrong dpi on all screens if the primary monitor has high resolution.
Last edit: Magnus Wester 2019-05-03