Windows Display Scaling for High-DPI Monitors

High-resolution monitors (4K, 2K) with small physical sizes require display scaling so text and UI elements aren't microscopic. Windows sets scaling automatically during display setup, but manual adjustment is often needed. Go to Settings > System > Display > Scale and set to 125% or 150% — 100% is the native resolution without scaling. Older applications may appear blurry when scaling is above 100% because they're not DPI-aware. Right-click the application's .exe > Properties > Compatibility > Change high DPI settings > check 'Override high DPI scaling behavior' and set to 'System' — this tells Windows to scale the app instead of the app handling it, which often sharpens the image. For multi-monitor setups with different resolutions or sizes, set different scaling per monitor: click the monitor in Display settings to select it, then adjust its scale independently. Be aware that some applications don't handle per-monitor DPI well and may look blurry when moved between screens. Signing out and back in applies scaling changes to all running applications.