Canon MX450 series Online Manual page 16

To scan an item again, select the image in the Preview area or the thumbnail at the top of the
screen, then click
again.
11. Click Save.
The combined image is saved.
Note
See "Image Stitch Window" for details on the Image Stitch window.
You can make advanced scan settings in the Settings (Scan and Stitch) dialog displayed by clicking
Settings....
Settings (Scan and Stitch) Dialog
(Delete). The selected image is deleted, allowing you to scan the item