Canon MP980 series On-Screen Manual page 447

Scanning Images Larger than the Platen (Stitch Assist)
The right half of the document is scanned.
10.
Adjust the scanned image as required.
Use the icons to swap the left and right halves, rotate the image 180 degrees or enlarge/reduce the
image.
(Swap Left & Right)
Swaps the left and right halves.
Important
This function is not available while the image is enlarged/reduced.
Rotates right half of the image 180 degrees.
Important
This function is not available while the image is enlarged/reduced.
(Enlarge)
Enlarges the displayed image.
(Reduce)
Reduces the displayed image.
(Full-screen)
Enlarges/reduces the image to display it full-screen.
Note
Enlarge/Reduce/Full-screen does not affect the actual size of the scanned image.
When the document is scanned upside down, the image displayed in the Stitch-assist window
will also be upside down. Click Rotate 180° to rotate the image to the correct orientation.
You can drag the right half of the image from right to left or up and down to adjust the position.
If the left and right halves do not match due to a slanted document, place the document
correctly and click Back, then scan again.
11.
Click Next.
12.
Drag the mouse to specify the area to be saved, then click OK.
Rotate 180°
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