Canon PIXMA MG2440 - Manual (Page 271)

PDF Settings Dialog
You can make advanced settings such as the PDF compression type to the PDF file to be
saved.
Select PDF for Data Format in the Save dialog of the Scan view, then click Settings... to
display the PDF Settings dialog.
Enable keyword search
Select this checkbox to convert text in images into text data and create PDF files that
support keyword search.
Document Language
Select the language for detecting text in images.
Detect the orientation of text documents and rotate images
Select this checkbox to detect the page orientation based on the text in images and
automatically rotate the images for creating PDF files.
Important
This function is available only for images (text documents) containing languages
that can be selected from Document Language. This function is not available
depending on the language in the image.
The page orientation may not be detected for the following types of images since
the text cannot be detected correctly.
Images with small amount of text
Images containing text with font size outside the range of 8 points to 48 points
Images containing special fonts, effects, italics, or hand-written text
Images with patterned backgrounds
Correct slanted text document
Select this checkbox to detect the document orientation based on the text in images
and correct the angle (within the range of -0.1 to -10 degrees or +0.1 to +10 degrees)
for creating PDF files.
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