For anyone on Windows wondering how to enable High DPI:
You need to find UE4Editor.exe file, make a shortcut to it, and add -enablehighdpi argument after quotes, like so: “C:\Unreal Engine\Epic Games\4.14\Engine\Binaries\Win64\UE4Editor.exe” -enablehighdpi
EDIT: Then launch Editor by clicking directly on shortcut you created.
(Your installation might be in C:\Program Files\Epic Games)
My first observations: I am very impressed! Beautiful sharpness and clarity with proper viewable size of text. Additionally, text in menu drop-downs are not cut off as with former widget reflector hack. So this is great!
There are a few quirks to be worked out still, as wires in Blueprint nodes do not respect your mouse’s position when dragging. Also, you still cannot launch your mobile preview in portrait mode. That currently only works at native resolution with NO dpi scaling in Windows, unfortunately. However, I am super excited to see this new feature being implemented! Great work, Epic!
~Adam