Avision AV100CS - Manual (Page 34)

4-11
4.6 Scanning
Preview: Previews your image to allocate the area to be
scanned.
Scan: Scans the area with the parameters you have set.
Exit: Cancels the current job.
As shown in the figure below, in the Preview window, you can
define the area to be scanned by dragging the cursor auxiliary
lines with the mouse.