Avision AV810CPlus User Manual page 29

Select MrScan-Expert as the source.
You need to select MrScan-Expert for just once except when
3.
you need to use the dialog box to select a different source. In
that case, you will need to select MrScan-Expert as the source
again before you can reuse the scanner.
Place the document upside down on the document board with
4.
the text facing away from you.
From the File menu, choose Acquire .
5.
Avision TWAIN user interface as Figure 4-2 will pop up on the
6.
screen. Click Preview or Scan button to scan the document.
Figure 4-2 PC TWAIN user interface
4-4