Canon iR3245 Manual page 26

If you want to stop a copy job:
1
Press
Several copies may be output even after you press
You can also cancel a copy job from the System Monitor screen. (See "Cancelling a Copy Job(p.1-31).")
If you want to interrupt a copy job:
To interrupt a copy job when you need to make priority copies, press
[Interrupt].
For instructions on interrupting a copy job, see "Interrupt Mode(p.1-48)."
If you want to start copying the next original while a previous original is
printing:
1-14 Flow of Copy Operations
.
.