User`s manual

Reference: The Preview Window 37
A. Smoked Glass Background
This option lets you apply a smoked glass background that makes your scan
jobs stand out more clearly and allows you to focus on the scan jobs. This
feature can also be used for multiple scan jobs to show their respective image
modes (example: one job in color, another in B&W), as well as their image-
editing settings.
The framed part of the
image (inside the marquee)
stands out clearly.
Applied to the rest of the
image is the smoked glass
background (shaded gray
area surrounding the
selection or framed area).