Fujitsu ScanSnap N1800 Operator's Manual page 409

3. Press the [Scan] button.
The scanning starts.
When the [Scan Viewer] is shown after a scan, you can check whether the
number of scanned sheets is the same as that set in the [Scan Count] window
at the area shown below.
Even if pages are deleted on the [Scan Viewer], the number of scanned
sheets is not changed.
409