Generate PDF creates a
PDF file on your local computer. PDF genration is now found under the TypeSet feature, which is accessed at the bottom of the editor window.
Compared to
printing from the file menu, the PDF output is more sophisticated and responsive to your script elements. It looks more professional because it is more in keeping with scriptwriting norms for presentation.
Your computer must be connected to the Internet to generate a PDF. No copy of your script is made when generating a PDF. It runs in memory only, getting converted on the fly, and is then routed back to the sender, after which it was like it was never sent as far as the Celtx Server is concerned.