"4K UHD is a resolution of 3840 pixels × 2160 lines" [1]. Our current emulation for this is 2560 x 2545. Which to me seems quite off horizontally. Either we should be able to handle full-4k or the option for this should be removed.

To get to this, set your DM to "Responsive" and use the grey quick-select bar to go up to a Large Laptop, then the next refresh will bring one more option which is 4k to go to.


[1] https://en.wikipedia.org/wiki/4K_resolution