I have a Samsung 28" E590 DS/ZA 4K monitor attached to my Mac mini. Its resolution is 3840 x 2160. My question is this: In the display settings, the Default for display option puts the screen at 1920 x 1080, which seems wrong. However, the clarity is absolutely fantastic at this resolution. If I scale it to the monitor's native resolution, it looks terrible. Is this some retina thing? I have no issue leaving it at the default (although everything is quite large). I'm just curious why macOS would choose the lower resolution. TIA.