Epson WorkForce Pro WF-C4310 Wireless Color Printer - Manual (Page 109)

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You see a window like this:
6. Select the size of the paper you loaded as the Paper Size setting.
7. To print multiple copies, select or enter the number as the Copy Count setting.
8. To print multiple copies of multi-page documents in sets, select the Collated checkbox.
9. Click OK .
You return to the printing preferences window.
10. Select the Layout tab.
11. Select the orientation of your document as the Orientation setting.
12. Click OK to save your settings.
You see your application's Print window.