Canon P-150M - Manual (Page 84)

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Scan Panel
Scan Panel is software for controlling scanning operations such as
feeding documents and stopping scanning when scanning multiple
documents one after the other.
The Scan Panel operates when [Feeding Option] is set to [Panel-
Feeding] or [Automatic Feeding] in the settings dialog box displayed
when you click [More] in the scanner driver.
It appears and the scanner enters the wait state after scanning of the
first document finishes. If you load the next document and click the
[Continue scanning] button of Scan Panel, scanning of the loaded
document starts. You can stop scanning part way through by clicking
the [Finish] button of Scan Panel.