Projector Output and Optics
The Screen ratio describes the physical image boundary. It does not set the GPU output resolution or detect a lens.
Configure a physical anamorphic lens under Screen Configuration → Lens → Anamorphic Lens. Set its expansion factor from the lens specification. Compensation prepares all content for the physical expansion; narrower pictures can retain side bars.
Without a lens, leave anamorphic compensation off. Manual Zoom, Automatic Zoom, and NLS remain separate picture-sizing controls.