Samsung PN59D6500DFXZA - Manual (Page 41)

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Pattern2 : This test screen demonstrates the effect of the display settings on
colors.
N
After selecting Pattern1 or Pattern2 , you can adjust any of the advanced
settings for the desired effect.
N
While the Expert Pattern is running, the TV does not output sound.
N
Only enabled in DTV, Component, and HDMI modes.
● RGB Only Mode ( Off / Red / Green / Blue ): Displays the Red , Green and
Blue colors so you can make fine adjustments to the hue and saturation.