Dell 968 All In One Photo Printer - Manual (Page 170)

7. Click OK.
8. After customizing your settings, click Scan Now.
Update the list of applications to send scans to.
Update the default fax driver.
Image
Enhancements
Straighten images after scan (deskew).
Sharpen your blurry images.
Adjust the brightness of your image.
Adjust the color correction curve (gamma) of your image.
Image Patterns Smooth the conversion of a gray image to a black-and-white dot
pattern.
Remove image patterns from magazines or newspapers (descreen).
Reduce the background noise on your color document.