Explanations in the section use TextEdit as an example. Operations and screens differ depending on the application. See the application's help for details.
Load paper in the printer.
Open the file you want to print.
Select Print from the File menu or another command to access the print dialog.
If necessary, click Show Details or to expand the print window.
Make the following settings.
If the above setting menus are not displayed, close the print window, select Page Setup from the File menu, and then make settings.
When printing on envelopes, select landscape orientation.
Select Print Settings from the pop-up menu.
On OS X Mountain Lion or later, if the Print Settings menu is not displayed, the Epson printer driver has not been installed correctly.
Select System Preferences from the menu > Printers & Scanners (or Print & Scan, Print & Fax), remove the printer, and then add the printer again. See the following to add a printer.
Make the following settings.
Click Print.