Onkyo TX-NR 838 Manual page 85

Edge Enhancement
Default Value: Off
Adjust the sharpness of the outline of image. Select from "Off", "Low",
"Mid" (Middle), and "High".
The setting will be fixed to "Off" if "Game Mode" is set to "On".
When the horizontal resolution of the output video is 2,000 TV
lines or more, this setting is set to "Off".
Noise Reduction
Default Value: Off
Reduces the noise of the screen. Select from "Off", "Low", "Mid"
(Middle), and "High".
The setting will be fixed to "Off" if "Game Mode" is set to "On".
Brightness
Default Value: 0
Adjust brightness of the screen. Select a value between "-50" to
"+50".
Contrast
Default Value: 0
Adjust contrast of the screen. Select a value between "-50" to "+50".
Hue
Default Value: 0
Correct hue of the screen. Select a value between "-50" to "+50".
Saturation
Default Value: 0
Adjust saturation of the screen. Select a value between "-50" to
"+50".
Color Temperature
Default Value: Normal
Set color temperature of the screen. Select from "Warm", "Normal"
and "Cool".