LEI Electronics TXDPF9 - Manual (Page 12)

12
TFT Contrast
This option can be used to set the screen contrast. The contrast is
divided into 15 different levels, from -7~0~7, with larger numbers
representing greater contrast.
TFT Saturation
This option can be used to set the saturation of the display. The
saturation is divided into 15 levels, from -7~0~7, with larger numbers
representing a higher degree of saturation.