Canon PIXMA MG4200 Series On-Screen Manual page 756

When you perform a scan, each area specified with a cropping frame will be scanned as a separate image.
Note
In whole image view, you can specify multiple cropping frames on the preview image.
Initial Cropping Frame
In thumbnail view
No cropping frame is specified. You can drag the mouse over a thumbnail to specify a cropping frame.
In whole image view
An active cropping frame is automatically specified around the preview image. You can drag the
cropping frame in the Preview area to specify the area.
Note
You can change the auto crop setting in the Preferences dialog. See Cropping Frame on
Previewed Images in "Preview
Cropping Frame Types
(1) Thick cropping frame (rotating or stationary)
Represents a selected cropping frame. Appears only in whole image view. You can select multiple cropping
frames by clicking them while pressing the command key. Output size, image corrections and other
settings on the Basic Mode tab or Advanced Mode tab will be applied to all the selected cropping frames.
(2) Thin cropping frame
- In thumbnail view
Output size, image corrections and other settings on the Basic Mode tab or Advanced Mode tab will be
applied.
- In whole image view
Represents an unselected cropping frame. The settings on the Basic Mode tab or Advanced Mode tab
will not be applied.
Adjusting a Cropping Frame
The cursor will change into
drag the mouse in the direction of the arrow, the cropping frame will expand or contract accordingly.
The cursor will change into
drag the mouse to move the entire cropping frame.
Tab" for details.
(Arrow) when it is positioned over a cropping frame. If you click and
(Crosshair Arrow) when it is positioned within a cropping frame. Click and