After a user has submitted a print request, you can change its priority in the print server's queue by doing any of the following:
Putting any print request on hold if it has not finished printing. Putting a request on hold stops the request, if it is currently printing, and keeps it from printing until you resume printing it. Other print requests go ahead of the on-hold request.
Moving any print request to the head of the queue, where it will become the next job eligible for printing. If you want a job to start printing immediately, you can interrupt the job that is currently printing by putting it on hold.
Changing the priority of a job still waiting to be printed or moving the job in the queue. Doing so will move the job ahead of lower priority requests and behind other requests that are the same priority or higher priority.