Canon LBP7780CX User Manual page 294

[Copies]
[Print 2-Sided]
[Binding Location]
[Store in Box]
6
Click [Start Printing].
Do not keep clicking [Start Printing] while the file is transferring. Sometimes it takes time to transfer a file, but if you
keep clicking during the transfer, a file failure may occur and it may be impossible to transfer it.
When the print job has finished sending, the display switches and the following message is displayed.
Specify the number of copies to be printed.
Specify 1-sided or 2-sided printing.
Select the binding location from [Short Edge] and [Long Edge].
(It is only displayed when an SD card is used.)
When storing it in a box, check the [Store in Box] check box before selecting the box where
you want to store it.