Epson Stylus Pro 10600 Reference Manual page 186

If you click the Show details arrow, an extension similar to the
one below appears at the bottom of the EPSON Monitor3 dialog
box. The extended dialog box displays detailed information on a
selected document's printer driver settings.
Changing print job priority
To change the priority of print jobs in a print queue, follow the
steps below.
Note:
You can also change the priority of print jobs that had print times
previously set in the printer driver's Background Printing dialog box.
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