I installed a Xerox 7970 with a C/Z Fold finisher. I installed the driver on a Mac using the installer package from the support site. When I open a document and go to print, the Xerox is selected, but I see nowhere to select the folding options. It doesn't look like the Xerox driver does in Windows. There is no "properties" to get into the settings, only an "Advanced" tab which brings up yet another generic looking window with a few options. Any advice?