Fujitsu N7100 Operator's Manual page 304

In duplex mode, the flip type can be selected when the page rotation angle is set.
The following table shows the flip types and the resulting scanned data.
Flip Type
Vertical 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
Horizontal 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
3. Press the [OK] button.
 The information entered is set.
HINT
If scanned data is incorrectly rotated, you can modify the orientation of the scanned data
in the scan viewer details window.
For details, refer to
Original document
Front side Reverse side
ABC DEF
Original document
Reverse side
Front side
ABC
"5.11 Editing the Scanned Data in the Scan Viewer" (page
304
5.9 Setting the Scan Options
Scanned Data
Front side
ABC DEF
Front side
ABC DEF
Scanned data
Reverse side
Scanned data
Reverse side
Rotated 180
316).