public Matrix3x2 TransformMatrix { get; set; }

Property Value

This matrix scales and/or translates how the swap chain appears on the display. It defaults to identity, which maps swap chain pixels 1:1 with the output.

Swap chain scaling may be used to render at a lower resolution than the physical screen.

Only scale and translation components are allowed in the matrix (no rotation, skew, etc.)

This property is not supported on objects created via CreateForCoreWindow Overload; any attempt to access it will fail.

Reference