Letterbox Settings
If an additional letterbox needs to be added to your render, inside the render resolution (for example, to show a gated camera sensor, safe zones etc), you can toggle the letterbox to be visible. Default is off.
Aspect ratio
Defaults to 0. Set X and Y to a specific ratio (for example X:16 and Y:9 for standard 16:9 letterbox).
Letterbox Opacity
The default letterbox is fully opaque. If you need to see behind it, then reduce opacity.