Steam Client always looked bad on high-res monitors, with small text and graphics, but it would appear that Valve finally decided to address these issues and implemented a 2X-scaling mode for Linux-based operating systems, promising high-resolution text and graphics on 4K monitors. Users can force the 2X-scaling mode by using the “GDK_SCALE=2” environment variable when starting the Steam Client. If it turns out you don’t like this scaling mode, you can turn it off by running the Steam Client with the “GDK_SCALE=1” environment variable. For now, Valve didn’t mention if a GUI option is coming too.