Open the color image you wish to convert. If the "Common Tasks" menu is not visible, click "View", then choose "Common Tasks." On the "Common Tasks" menu, click the "Effects" arrow, and then click "Black and White."
To further fine-tune and enhance the black and white image, click "Black-and-White Effects" under the "Effects" menu. Here you can adjust the hue and saturation of the image to suit your taste.