Canon PIXMA MG4200 Series On-Screen Manual page 758

settings will be applied to all the selected cropping frames.
When you create a new cropping frame, it retains the settings of the latest cropping frame.
Note
Create up to 12 cropping frames.
Scanning takes longer than usual when multiple cropping frames are selected.
Deleting Cropping Frames
In thumbnail view
To delete a cropping frame, click an area outside the cropping frame on an image.
In whole image view
To delete a cropping frame, select it and click
Alternatively, press the delete key.
When there are multiple cropping frames, all the selected cropping frames (active cropping frame and
selected cropping frames) are deleted simultaneously.
(Remove Cropping Frame) on the Toolbar.
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