Priority Printing; Selecting The Job For Priority Printing From The System Monitor Screen - Canon imageRUNNER C3489 Reference Manual

Priority Printing

You can change the printing priority of a job, so that it is printed right after the
current job is complete.
Selecting the Job for Priority Printing from the System
Monitor Screen
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Priority Printing

Press [System Monitor] ➞ [Print].
Press [Status] ➞ select the job for priority printing ➞ press
[Print Next].
Press [Done].