Canon PIXMA MG4200 Series On-Screen Manual page 375

Applies cropping.
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Returns to the Scan view without applying cropping.
(Previous Image/Next Image)
Switches the displayed image when there are multiple scanned images.
(3) Display Size Setting Bar
(Thumbnail View)
The view switches to Scan.
(Whole Image View)
Fits the preview to the area size.
(Reduce/Enlarge)
Click (Reduce) or
the display size by dragging the slider.
Related Topic
Cropping Scanned Images
(Enlarge) to reduce or enlarge the display size. You can also freely change
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