Epson SureColor T3170M 24" Wireless Printer, Scanner & Copier - Manual (Page 112)

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You see the expanded printer settings window for your product:
Note: The print window may look different, depending on the Mac OS version and the application
you are using.
5. Select the Copies and Pages settings as necessary.
Note: If you do not see these settings in the print window, check for them in your application before
printing. They may be accessible by selecting Page Setup from the File menu.