Canon MX870 Series User Manual page 666

Important
Some applications do not support continuous scanning from the ADF (Auto Document Feeder).
For details, refer to the application's manual.
Note
To scan magazines containing many color photos, select Magazine(Color).
Click Preview.
3.
Preview image appears in the Preview area.
Important
Preview is not displayed when an ADF type is selected for Select Source.
Note
Colors are adjusted based on the document type selected in Select Source.
Set Destination.
4.
Note