Microsoft MVP Jim Gordon has announced his new grayscale printing add-in for PowerPoint that works with both Windows and Mac versions of PowerPoint.
This is what Jim says about his add-in:
Sending grayscale output to printers can significantly reduce printing times for black and white laser printers. Some color objects don’t display or print as expected in grayscale. GrayScaleTool has grayscale controls for adjusting grayscale properties readily available. The add-in may benefit large organizations that share networked laser printers. GrayScaleTool is for people who often print GrayScale (saves on color ink), or who want to do special effects with grayscale printing.
Check out this site for more info.

