The PPT is usually edited by everyone, but if you print such a presentation in a Black-and-white printer, the readability is poor. Here's how to print a clearly readable presentation with a Black-and-white printer:
First click Tools-Options command, click the Print tab, under the "Default print settings for this document" heading, click Use the following print settings, and then in the Color/grayscale box, click Pure Black and white.
When you're sure, selecting grayscale in the color/grayscale box is the best mode for printing color slides on a black-and-white printer. Different color formats are displayed in different grayscale, and pure black and white mode changes most shades of gray to black or white, and can be used to print drafts or clear readable speaker notes and handouts; Color mode enables you to print a color presentation, or to print to a file and store color information in *. PRN file. When you select color mode, if the printer is a black-and-white printer, grayscale mode is used when printing.