plotting dwg files containing grayscale color images

[EnryVerly]

Hello everyone,
I should print a dwg file containing raster images.. .
the problem is that such images are in color and I would like to print them in black and white..How should I do?
If the question is ridiculous you have patience.. I am a new member of the forum :biggrin:

 

[lattu]

also the rest of the file you have to print it in grayscale?