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Bitmap - options - Color Space
Overview  

There are 3 options for the Color Space for the Bitmap output:

bilevel (black & white) When this is selected you autoamtically get a black and white image and there in NO anti-aliasing as you can only have black or white pixels.
grayscale (monochrome)  When selected you autoamtically get a a grayscale image.
rgb (color) When selected an rgb colro file is produced.

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