PDF (VT) filter
PDF/VT (Portable Document Format/Variable Transactional) is an Adobe created variable data file format. When PDF (VT) is selected, all other PDF options except for the Output file type of PDF are disabled.
The PDF/VT checkbox appears only when the Hot Folder is connected to a Fiery server that supports PDF/VT.
If the Fiery server supports PDF/VT, you can specify PDF/VT as the input format by selecting PDF in the General list in the Input Formats dialog box, and then selecting PDF/VT in the PDF pane.