Epson Stylus Photo RX500 User Manual page 46

You see a screen like this:
13. Monitor the progress of your print job or do one of the following:
Select the print job in the Status list, then click
Select the print job, then click
Select a print job marked "Hold" and click
If multiple print jobs are listed, select a print job, then click the Priority
arrow as necessary to reorder the jobs.
14. When you're finished, close the Stylus Photo RX500 window or Print Center.
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Printing From a Computer
Delete
to pause printing.
Hold
Resume
to delete the job.
to resume printing.