User’s Guide Scanning G Click OK . Your scanned image is saved. Image Adjustment Features Epson Scan offers a variety of settings for improving color, sharpness, contrast, and other aspects affecting image quality. See the Help for more details on Epson Scan. 50 Histogram Provides a graphical interface for adjusting highlight, shadow, and gamma levels individually. Tone Correction Provides a graphical interface for adjusting tone levels individually.