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Simply making maps black & white won't help
Get rid of those messy extra details
Easier to read and cheaper to print maps...
Dump all the unwanted messy details
If you are using version 7 & not entirely comfortable with your new Color Palette, best familiarize yourself with how it works here first so you can correctly set your foreground & background paint swatches for this operation.
We'll use Color Replacer Tool to eliminate extra details in the map by turning those details into the same color as the map background & render a bunch of that map clutter invisible.
If you run into elements that cannot be wiped out globally because you will lose other desirable details: Choose Paintbrush on the Tool Options Palette and use the Color Replacer to paint over tight areas without affecting other surrounding colors.
Pick that light blue stream across the map as your background color & yellow as the foreground
Paint away that light blue stream with your Color Replacer tool by using the paintbrush. Notice how your painting only affects that light blue stream and doesn't damage W. Edinger Ave.?
That's the power of Color Replacer. Painting with the Color Replacer tool works like a highly selective eraser. For really stubborn or problem spots like that resistant mapquest logo, keep increasing the tolerance up to the Max.