ShowPlay Reference Manual, Chapter 3 (ControlVariables): rgbscale

RGBscale - Image display brightness intensity scaling factor

RGBSCALE is a floating point number – its default value is 1.0.
If RGBSCALE is not 1.0, Showplay will scale pixel intensities of all images by RGBSCALE when they are displayed.

See Also:
Display Scaling, Widscale, Hgtscale, Sx0/Sy0

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