Canon LBP7210Cdn Manual page 280

Specify the setting for [Page Layout].
(1) Display the [Page Setup] sheet.
(2) Select the number of pages to be printed on one sheet.
NOTE
If you cannot specify the setting
If [Spooling at Host] in the [Device Settings] sheet is set to [Disabled], [Page Layout] is grayed
out and cannot be specified.
See "Changing the Setting for Spooling at Host"
[Auto].
Using Preview to specify the setting for [Page Layout]
You can also specify the setting for [Page Layout] using Preview.
and change the setting for [Spooling at Host] to