Here's what I had to do:
1) Open Safari browser and go to "localhost:631"
This takes you to the CUPS (print control system on OS X) internal admin web page. Yes, it's on your computer.
2) If it doesn't work, you will need to open a Terminal Utility window and type this command:
sudo cupsctl WebInterface=yes
It asks for your admin password - and hides it from view, so you have to type "blind."
3) Go to the Printers tab. Click on your Epson. In the small pull-down menu Administration, select Set Default Options.
4) In the first page that comes up "General Options," make your changes. (hope I remember what I changed) I set Advanced (bottom of page) to ON, then Color - Black; Mode - Advanced; Custom - Custom settings; Print Quality - Economy. Then to make it stick, go to the next page "Options Installed," and click Set Default Options.
5) Done.