UE 4 Resolution

Just starting to use UE 4 to develop. All of the icons and the viewport is big and blurry. I am on a 65" 4k HDR Display. How do I change the resolution of UE4? (NOT THE GAME, JUST THE ENGINE).

UE just uses your screen resolution in the editor. What res are you running your local screen at?

You may want to check your Windows Display Scaling Settings, putting mine above 100 produces the effect you are describing