Hi Daniel
this is a common issue for apps that aren’t “HiDPI aware”. This is set in the application manifest or by calling a Windows API. It means you need to detect changes to DPI settings (scaling) and respond by scaling your rendering.
In many cases you won’t want to scale e.g. for displaying layout / sheets since these are scalable anyway. Windows will do a lot of scaling for things like icons etc, but the issues tend to crop up with text, esp if you specify fonts by pixels rather than points.
MS has a bunch of documentation on how apps can cope with changes to scaling like this, it’s been part of Windows since Vista, but became a much more prominent issue in Windows 8 and later.
Cheers
Adrien