Epson 660 - Manual (Page 71)

Operation problems
Why can’t I set preview action under Auto Function?
If all check boxes in Auto Function Settings Dialog are unchecked, it will be disabled. You can check any of
the boxes in that dialog to activate it.
Why the button of Auto-function doesn’t work?
If all of sub-items of it in Advanced settings are unchecked, it is disabled. To check any of them, button will
work.
Why the buttons of "Add" and "Duplicate" in preview window don't work?
If frames' or jobs' number in preview window is more than 28, it will be disabled.