Fujitsu ScanSnap N1800 Operator's Manual page 388

In duplex mode, the bind direction can be selected when the page rotation angle is
set.
The following table shows the bind directions and the resulting scanned data.
Bind
Direction
Long Edge Select this setting when scanning a document with opposing left and
right pages (facing pages with long side as the middle crease).
The scanned data is output with the same orientation as the original
document.
Feed direction
Short Edge Select this setting when scanning a document with opposing top and
bottom pages (facing pages with the short side as the middle
crease).
The front side of the document is output with the same orientation as
the original data, whereas the data on the reverse side is rotated 180
degrees.
Feed direction
This returns you to the [Scan Settings] window. The selected setting is displayed
to the right of the [Page Orientation] button.
Irrespective of what page orientation is decided, pages may still be manually
rotated as desired in the [Scan Viewer] window.
For details, refer to
395).
Scanned Data
Original document
Front side Reverse side
ABC DEF
Original document
Front side Reverse side
ABC
"6.11 Editing the Scanned Data in the Scan Viewer" (page
388
6.9 Setting the Scan Options
Scanned data
Front side Reverse side
ABC DEF
Scanned data
Front side Reverse side
ABC DEF
Rotated 180 degrees