Canon MF6180dw Manual page 459

Tone Curve Settings
This dialog box enables you to adjust the brightness of a specific area of an image by selecting the type of the tone curve.
[Channel]
[Select Tone Curve]
[Reset]
Final Review
This dialog box enables you to confirm the color settings.
Threshold
You can adjust the threshold setting. By adjusting the threshold, you can sharpen characters in a text document and
reduce back-printing such as in newspapers.
NOTE
Threshold
Brightness of color and gray images is expressed by a value between 0 and 255, while brightness of black and white
images is expressed by white or black, including colors between black and white. The boundary to divide colors into white
and black is called "Threshold."
Select a color to adjust either [Red], [Green], or [Blue], or select [Master] to adjust all three
colors together when [Color] is selected in [Color Mode].
When [Grayscale] is selected in [Color Mode], adjust gray color.
Select a tone curve type from [No Correction], [Over Exposure], [Under Exposure], [High
Contrast], and [Invert the Negative/Positive Image].
Resets all the current settings to their default values.