Canon MP980 series On-Screen Manual page 500

Scan Settings Dialog Box (Photos/Documents)
You cannot select this checkbox when Document Type is Color Photo, Black and White Photo.
You cannot select this checkbox when Document Size is Stitch Assist.
This function may not work properly depending on the document language. Only text documents
written in languages that can be selected from Document Language are supported.
The orientation of the following types of documents may not be corrected, as the text cannot be
detected correctly. In that case, select the scanned image in the Thumbnail window of the
Photos/Documents (Platen) Screen (Scan/Import Window)
- Resolution is outside the range of 300 dpi to 600 dpi
- Font size is outside the range of 8 points to 48 points
- Documents containing special fonts, effects, italics, or hand-written text
- Documents with patterned backgrounds
Note
Scanning takes longer than usual when you enable Detect the orientation of text documents and
rotate images.
Document Language
Select the language of the document to be scanned.
Important
You cannot select this checkbox when Document Type is Color Photo, Black and White Photo.
You cannot select this checkbox when Document Size is Stitch Assist.
Defaults
Restore the default settings.
and rotate it with Edit Tools.
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