The XY rotation of the overlay in
radians.
Assembly: AGI.Graphics.Overlays.Interop(Module: AGI.Graphics.Overlays.Interop) Version: 9.0.0.0 (9.0.0.0)
Assembly: AGI.Graphics.Overlays.Interop(Module: AGI.Graphics.Overlays.Interop) Version: 9.0.0.0 (9.0.0.0)