Visioneer XP 450 - Manual (Page 105)

100 V ISIONEER S TROBE XP 450 S CANNER U SER ’ S G UIDE
The TWAIN Interface opens.
7. Insert a page into the scanner, face-down, and the Scan button on
the TWAIN Interface will become active.
Note: If you are setting up PaperPort for WIA, the WIA interface
opens instead.