Acer S1212 - Manual (Page 30)

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Note: "Saturation" and "Tint" functions are not supported under
computer, or HDMI (PC) mode.
Color
Temperature
Adjusts the color temperature. At higher color
temperatures, the screen looks colder; at lower color
temperatures, the screen looks warmer.
Dynamic Black
If turned on, the projector dynamically adjusts the power
consumption of the lamp according to the brightness of
the image being projected. When projecting darker
images the power consumption will be reduced and the
contrast of the image will also be enhanced.
Gamma
Effects the representation of dark scenery. With greater
gamma value, dark scenery will look brighter.