Canon MF229dw User Manual page 231

[Channel]
If you select [Color] for [Color Mode], you can adjust the [Red], [Green] and [Blue] color channels separately.
To adjust all three colors at the same time, select [Master]. You can combine the adjustments made in [Master]
and those made in the individual color channels.
If you select [Grayscale] for [Color Mode], only [Grayscale] is displayed.
[Select Tone Curve]
Select from the items listed below.
[No Correction]
[Over Exposure]
[Under
Exposure]
[High Contrast]
[Invert the
Negative/Positive
Image]
(Final Review)
(Threshold)
[Threshold Level]
Slide
Registering or Calling Settings
Call registered brightness or color settings for
Specifying Other Settings
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before and after adjustment. Select a registered tone curve to adjust the brightness and
contrast levels of the image.
Performs no correction.
Lightens the entire image.
Darkens the entire image.
Emphasizes the difference between the light and dark parts of the image.
Inverts the light and dark parts of the image.
The results of all adjustments made to the brightness, contrast (
curve settings ( ) are displayed in a tone curve and as numerical values. Perform a final
check of the color settings.
Adjust the threshold value for black and white images. You can enhance the appearance of
text or reduce the visibility of text or images printed on the reverse side of a semi-transparent
document, such as a newspaper. The setting is available if you select [Black and White] for
[Color Mode].
*
The threshold value is the boundary that separates whether a color is rendered as black or white. Colors
below a certain density level are rendered as white, and colors above a certain density level are rendered as
black.
or enter a value. To render more parts as black, slide
*
to the right or enter a larger value.
to and . Registering Frequently Used Settings
), histogram ( ), and tone