Fujitsu ScanSnap N1800 Operator's Manual page 313

5. Under [Text Recognition for Pages], specify the pages to be output in
searchable PDF.
6. Press the [OK] button.
This returns you to the [Scan Settings] window. The setting selected for [Text
Recognition for Pages] is displayed to the right of the [Text Recognition] button.
6.9 Setting the Scan Options
313