List of installed scanners. The selected scanner appears checked.
If the scanner is TWAIN compliant, powered and connected to the machine, it appears in this list.

Desired number of pages per document.
Enter 0 to perform a multi-page scan in a single document. After scanning, you will still be able to split/group the pages into several documents.

see the article : "Document Processing"

Selecting the location of documents in the scanner.
This option requires a compatible scanner.

Option to process both sides of the pages.
This option requires a compatible scanner.

Option to automatically delete blank pages, depending on the threshold entered.
It is recommended to leave the default value.