CSS group has and enhancement to our product DataManager Web Portal to display an overlay on a PDF file to show the where the panels folds will fall. We store the JDF fold information for an Item, then based upon the PDF Trim Box, we will build a display of the panels. The Page is under development right now, but I can send you a PDF to show the functionality and features if you like. Typically JDF folds are symmetrical, may include panel size adjustments (Stock Caliper) or maybe the fold is not desired to be symmetrical, and have short panels along some of the fold. The features will include producing a JD fold file which can be saved and sent to the folder if JDF enabled
Regards
Steve MacKenzie