Adobe® Photoshop® 7.0 Classroom in a Book®

Adjusting the tonal range

The tonal range of an image represents the amount of contrast, or detail, in the image and is determined by the image’s distribution of pixels, ranging from the darkest pixels (black) to the lightest pixels (white). You’ll now correct the photograph’s contrast using the Levels command.

1.	Choose Image > Adjustments > Levels, to open the Levels dialog box.
2.	Make sure that the Preview check box is selected, and then move the dialog box aside, as needed, so that you can also see the image window as you work. In the middle area of the dialog box, the three triangles directly beneath the histogram represent the shadows (black triangle), highlights (white triangle), and midtones or gamma (gray triangle). If your image ...