Avision AV100III - Manual (Page 18)

4-2
do this whenever the scanned image seems to be too dark.
Place the image to be scanned face down on the scanner.
From the File menu, select Acquire.
Avision Sheet-fed TWAIN user interface will pop up on
the screen. Click on the Prescan or Scan button to get
the image.
The TWAIN user interface: