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Brightness/Contrast
 
The brightness adjustment adjusts/regulates the background brightness respectively the black level of the screen. After the adjustments all grey levels  (1-10% white) should be just visible. (Some graphic board drivers don't display the upper grey levels (1-5%). When adjusting the brightness too high black parts may appear grey.
 

  Contrast:
The desired picture brightness can be adjusted with 'Contrast'. The contrast should be adjusted to the
necessary brightness level without any burn out. A burn out appears as colour teared right edges of the picture.