You can scan the original by erasing the background color or prevent the original image on the reverse side of thin originals from appearing on the recorded pages.
If [A] (Auto) is selected as the scan exposure on the Scan screen, pressing [Image Qual. Adjustment] and making fine adjustments cancels the automatic scan exposure setting. Similarly, if you select [A] (Auto) for the scan exposure setting when image quality adjustments have been made, the Image Quality Adjustment mode is canceled and the automatic exposure is used instead.
To automatically adjust the quality of the background, select [A] (Auto) for the scan exposure. (See "Automatic Exposure Adjustment.")