Under Output, you need to be set to Separations instead of Composite. If that menu item is greyed out as well, then you need to look at the PPD section above, just below Printer. If it is set to Device Independant it will block the features you need. It needs to be set to a printer, I don't think it matters what printer just as long as it is set to one.
i would like to do that but separation option is grayed out. How can i fix it? thanks
Under Output, you need to be set to Separations instead of Composite. If that menu item is greyed out as well, then you need to look at the PPD section above, just below Printer. If it is set to Device Independant it will block the features you need. It needs to be set to a printer, I don't think it matters what printer just as long as it is set to one.