High DPI / Display Scaling

XAML layout uses effective pixels (epx) — scaling is automatic for all XAML-rendered content.

• Bitmap assets MUST be provided at multiple scales: .scale-100, .scale-125, .scale-150, .scale-200, .scale-400
• For custom rendering (Win2D, Direct3D interop), query XamlRoot.RasterizationScale and listen for RasterizationScaleChanged
• Pixel sizes MUST NOT be hard-coded in code-behind — rely on XAML layout and the scaling system

Change History