Fujitsu S1100 - page 196

Using the ScanSnap in Various Ways (for Windows users)
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6. Press the [Scan/Stop] button on the ScanSnap to start scanning.
7. Press the [Scan/Stop] button on the ScanSnap to finish scanning.
The scanned image is saved in the correct orientation.
Load another document in the ScanSnap when you want to scan multiple sheets. Scanning
starts automatically when a document is loaded.