You can resume either the Processor queue or the Proofer queue as long as they have already been paused. Resuming the Processor queue allows a new proof to enter the processor once it is done processing its current job. Resuming the Proofer queue allows a new sheet to enter the Proofer once it is done proofing its current sheet.
The proofing software changes thebutton to the
button, and resumes the queue, which allows jobs to be processed and sheets to be proofed.