Fujitsu ScanSnap N1800 Operator's Manual page 391

4. Press the [OK] button.
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
398).
"6.11 Editing the Scanned Data in the Scan Viewer" (page
391