Canon mp280 - Manual (Page 516)

Note
Only Grayscale will be displayed in Channel when Color Mode is Grayscale.
Brightness
Adjust the image brightness. Move (Slider) under Brightness to the left to darken and right to brighten
the image. You can also enter a value (-127 to 127).
Darkened Original image Brightened
Note
Highlights may be lost if you brighten the image too much, and shadows may be lost if you darken
the image too much.
Contrast
"Contrast" is the degree of difference between the brighter and darker parts of an image. Increasing
contrast will increase the difference, thus sharpening the image. Decreasing contrast will decrease the
difference, thus softening the image.
Move (Slider) under Contrast to the left to decrease and right to increase the contrast of the image.
You can also enter a value (-127 to 127).
Decreased contrast Original image Increased contrast
Note
Increasing the contrast is effective in adding a three-dimensional feel to soft images. However,
shadows and highlights may be lost if you increase the contrast too much.
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Page 516 of 707 pages Adjusting Brightness and Contrast