I'm also using a 4k monitor, with DPI set to 175%. Works for desktop use, but Steam overlay is still small. I'm guessing they aren't using the OS DPI setting to scale their UI. Complain to Valve I guess.
I'm also using a 4k monitor, with DPI set to 175%. Works for desktop use, but Steam overlay is still small. I'm guessing they aren't using the OS DPI setting to scale their UI. Complain to Valve I guess.