Mac Forums

Certain native Mac OS X applications that handle text or images have the "PDF Menu" within the print dialog. At the bottom of the PDF Menu, there is the option to "Edit Menu..." The editable table includes the option to remove and add "Printing Workflows." Choosing to add a Printing Workflow allows you to browse for applications. What could be added to the PDF Menu? Is it possible to add an option to the PDF Menu to allow printing to an epub file, the way it allows you to print to a pdf document?

Essentially, how is the document 'sent to' the application chosen as a "Printing Workflow" in the PDF Menu? The way this works is a mystery to me, and even if adding a print-to-epub feature is not possible, I'd still like to understand it.