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TFT Contrast
This option can be used to set the screen contrast. The contrast is
dividedinto15dierentlevels,from-7~0~7,withlargernumbers
representing greater contrast.
TFT Saturation
This option can be used to set the saturation of the display. The
saturationisdividedinto15levels,from-7~0~7,withlargernumbers
representing a higher degree of saturation.