3.If using the PS driver, on the [Colour] tab, click [Greyscale], and then click [Advanced] if you want to adjust brightness and contrast.
MAC OS X
1.In your application program, choose [File] → [Print].
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2.From the [Printer] menu (1), select your printer.
3.From the next menu (2), select [Printer Features].
4.From the [Feature Sets] menu (3), select [Colour Options].
5.From the [Colour Mode] menu (4), select [Greyscale].
6.Select [Always Use Printer Halftone] checkbox (5). This ensures best quality when using greyscale.
7.Select the [Use optimized greyscale halftones] checkbox
(6).
This may slow down printing slightly, but will produce superior results.
A guide to printing > 38