Asus SP6540 User Manual page 18

3.1.2 OSD function introduction
2. Color
Set a desired color setting from this menu.
Brightness：the adjusting range is from 0 to 100
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Contrast： the adjusting range is from 0 to 100
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Saturation： the adjusting range is from 0 to 100
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Color Temperature : contains 3 modes including Cool, War, and User Mode.
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Skin Tone : contains 3 modes including Reddish, Nature and Yellowish.
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3. Image
Set the image related setting from this menu.