Gray Adjustment (Mac OS X)
You can set the gray adjustment.
Adjusting Monochrome (Photo)
Sets monochrome printing for black-and-white photo image data captured with a scanner or digital camera.
Select Monochrome (Photo) on Color Mode in the Color Settings panel.
Select Gray Adjustment.
Click the Color Balance list and select the color settings.
Pure Neutral Black
Adjusts cool black (blue tones) to gray.
Adjusts to neutral gray.
Adjusts warm black (red tones) to gray.
To perform the adjustments, drag the X or Y slide bar left and right.
You can also click the up or down arrow, or enter the number directly to increase or decrease the value by X and Y.