Brother MFC-640CW User Manual page 127

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White Balance
This setting adjusts the hue of the white areas of an image.
Lighting, camera settings and other influences will effect the
appearance of white. The white areas of a picture may be slightly
pink, yellow or some other colour. By using this adjustment you
can correct this effect and bring the white areas back to pure
white.
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Sharpness
This setting enhances the detail of an image. It is similar to
adjusting the fine focus on a camera. If the image is not in true
focus and you cannot see the fine details of the picture, then
adjust the sharpness.
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Colour Density
This setting adjusts the total amount of colour in the image. You
can increase or decrease the amount of colour in an image to
improve a washed out or weak picture.
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