Fujitsu ScanSnap S1500M Operator's Manual page 238

6.
Place the end with the black and white pattern as the leading edge in the
direction of the arrow.
Set the back side of the document facing towards you.
Secure the Carrier Sheet with the side guides to avoid
skewing.
When the [Set the document with its face up] check box is selected in the [Scanning mode
option] dialog box (Right-Click Menu → [Scan Button Settings] → the [Scanning] tab → the
[Option] button), place the document in the Carrier Sheet face-up and bottom edge down.
Using the ScanSnap in Various Ways (for Windows Users)
238