4. Choose Image > Adjust > Levels. Notice the histogram in the dialog box; if your image had colors across the entire brightness range, the graph would extend across the full width of the histogram. Instead, the graph is cluped toward the center, indicating there are no very dark or light areas.

5. Drag the left and right sliders inward where the histogram indicates the darkest and lightest colors begin. Click OK.

Contact us with questions, comments and feedback: acs-worskhosp@umail.umd.edu
Catherine Hays Zabriskie chays@deans.umd.edu 301-405-2886
College of Arts and Humanities, University of Maryland