Epson EPL-N3000 Reference Manual page 159

Note:
Cassette 2 and Cassette 3 can be selected only if the
corresponding optional cassette unit is installed on your printer.
If you are printing on a custom paper size created under the Custom
Page Default setup option page on the Page Setup dialog box, the
paper must be fed from the MP Tray. Only the Auto Tray Select
and the MP Tray options can be selected.
Background Printing
Print in
Foreground (no spool file)
Select this radio button to print the document in the foreground.
When this is selected, you cannot use your computer for other
operations while printing.
Background
Select this radio button to print the document in the background.
When this radio button is selected, you can use your computer
for other operations while printing.
Print Time
Urgent
Select this radio button to give the document first priority among
the print jobs in the print queue.
Normal
Select this radio button to place the document in the print queue
in the order received.
Print at
Select this radio button to specify a date and time to print the
document.
Put Document on Hold
Select this radio button to keep the document in the print queue
without printing it.
146
Using the PostScript Printer Software (Macintosh)