Canon IMAGE FORMULA DR-C125 - Manual (Page 53)

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When you want to scan a document placed upside-down
Select the [Upside-down feeding] check box on the [Feeding] tab if
you want to insert documents into the scanner upside-down (i.e., with
the top edge of the document facing down).
When you want to match the orientation of images to the
text when scanning a mixture of pages with different text
orientations
Select [Text orientation recognition] in [Document Orientation] on the
[Others] tab. The text orientation on each page is detected, and the
scanned image is rotated in 90-degree increments to correct the
orientation.
When you want to rotate the images of a document placed
horizontally to correct the orientation
Specify the rotation angle in [Document Orientation] on the [Others]
tab.
When you want to set the scanner conditions
automatically
Set [Full Automatic Mode] in [User Preference] to scan with scanning
conditions that match the document.
Hint
When [Full Automatic Mode] is selected, [Color mode], [Page Size],
and [Dots per inch] are all detected automatically. In addition, the
[Scanning Side] setting becomes [Skip blank page] and [Document
Orientation] becomes [Text orientation recognition].