Epson Stylus Pro 4000 Reference Manual page 210

Mode
You can select Automatic, Custom, or Advanced settings.
Automatic
Automatic is the quickest and easiest way to start printing. When
Automatic is selected, the printer driver takes care of all detailed
settings based on the current Media Type and Ink settings.
Note:
Depending on the media you choose in the Media Type list while
Automatic is selected, a slider appears in the Mode box that lets you
choose Quality or Speed. Select Quality when print quality is more
important than speed. Select Speed when print speed is more important
than quality.
210
Printing with Mac OS X