Quality Adj.

Adjust the scan density of the entire original, density of the original background, image outline, and contrast. Also, adjust the separation output level of the text part and photo part in an image.

Scan Density: - 4 to + 4
Back. Removal: - 6 to + 2,Auto

Sharpness: - 4 to + 4
Contrast: - 4 to + 4

Distinction: - 4 to + 4

OK
Applies the setting.

Cancel
Cancels the setting.

Default Set
Press Default Set on the Individual Setting screen to reset to the default. If you press
Default Set on the Quality Adjustment screen, all the quality adjustment settings are returned to their respective defaults.

Reference