Problem with resolution

4K monitor. In Windows, 225% increase is selected. Everything in ue is displayed correctly, except for the viewport. The display is cloudy, but it can be fixed with a bug. When opening a static mesh or material, you need to take the window and drag it in one row with the main tab, and then the display becomes very clear. After rebooting ue, things are still awful. This was the case on different PCs with different 4K monitors. How can I change the resolution of a viewport without changing the resolution of another UI?