Canon S400 User Manual page 224

Set the print order using "Print in reverse order" or "Print collated pages," as
3
necessary.
Print in reverse order:
Use this setting when you print a multiple page document. The printer
starts printing from the last page of the document. When this setting is
disabled, the printer starts printing from the first page of the document.
Print collated pages:
Use this setting when you print multiple copies of a multiple page
document.
When "Print collated pages" is enabled, the printer prints the document and
collates each copy from the first page through to the last page.
When "Print collated pages" is disabled, the printer prints the document
and collates copies of the same page. In this case, you will need to
manually combine the pages to create each set of a multiple-page
document.
Executing Special Functions
Using the Macintosh Printer Driver 224