What is the best way to save my color figure as a gray scale?
Use gray levels between 20% and 80%, with at least 20% difference between the levels of gray. Use a screen of 80 lpi (lines per inch) or lower (coarser), and make the figures as close to final publication size as possible; reduction can cause levels of gray to drop out. Whenever possible, use different patterns of hatching instead of shades of gray to differentiate between areas of a figure. Required resolution for gray scale files is 300–600 dpi.
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