When you wish to scan thin originals using the automatic document feeder, you can use this function, which helps prevent thin originals from misfeeding.
Slow Scan Mode must be specified before scanning the original.
The "2-Side to 2-Side" and "2-Side to 1-Side" modes of automatic 2-sided copying cannot be used.
To always scan the original in the slow scan mode:
In "Setting mode", select [System Settings] → [Device Control] → [Original Feeding Mode].