Canon P-150M - Manual (Page 80)

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Specifying the Scanning Area
Configure the following settings when you want to specify the area of
the document to be scanned.
Specifying an area
Select the [Set Scanning Area] check box and specify the area of the
document to be scanned.
If you select the [Check the image of the first page] check box, only
one page of the document is scanned and the corresponding scanned
image is displayed in the preview window.
Configuring Scanner Settings According
to Purpose
Set the scanning conditions according to the scanning purpose.
When you want to delete the images of the blank pages in
two-sided documents
Set the scanning side setting to [Skip blank page] to delete the images
of the blank pages in the document.
If [Skip blank page] is selected, you can adjust the level for judging
whether pages are blank.