Samsung UN65D8000XFXZA - Manual (Page 37)

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English
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N
When you make changes to Backlight / Cell Light, Contrast, Brightness,
Sharpness, Color or Tint (G/R) , the OSD will be adjusted accordingly.
N
When connecting a PC, you can only make changes to Backlight / Cell Light,
Contrast, Brightness , and Sharpness .
N You can adjust and store Settings for each external device connected to the TV.
N Lowering picture brightness reduces power consumption.