Canon MX450 series Online Manual page 105

If you have the next sheet of document to scan, load it on the platen glass and press the
OK button. The machine starts copying.
If you do not need more scanning, press the tone button to start copying. The machine
starts copying.
Note
You can add the copying job while printing.
Adding the Copying Job (Reserve copy)
• When the document has been loaded in the ADF:
The machine starts scanning the next sheet of document automatically after one sheet of
document finishes being scanned.
Note
If Memory is full appears on the LCD when scanning, set the image quality to Standard or
reduce the number of sheets of documents, then try copying again. If the problem is not
resolved, set the image quality to Fast and try copying again.