The Print Black & White option on the Print dialog box allows you to automatically print in black and white no matter what your on-screen colors are. This is particularly beneficial for users of laser printers and PostScript printers, because these printers do not always translate on-screen colors to readable shades of gray.
In order to take full advantage of the widest selection of gray shading, first set up your screen colors any way you choose and then print a Time Line for Windows report. If your report shows readable contrast, then you do not need Print Black & White. If the output is not readable (for example, not enough contrast between foreground and background), use the Print Black & White option, and print again.
With the Print Black & White option all text is clearly visible, and fewer shades of gray are used. Foreground text is always at least 25% darker than the background.