There is a PDF file that was created via Foxit PhantomPDF Printer and is opening in Foxit PhantomPDF, but is not saved yet.
You continue to print and want it to be appended into the previously generated document.
1. Create a PDF file by printing to Foxit PhantomPDF Printer. This document will be opened in Foxit PhantomPDF.
2. Go to File menu in PhantomPDF, click on Preferences.
3. Go to Create PDF, check the option Insert the Printed pdf into previously generated documents, except those created by Foxit PhantomPDF , click Ok to apply the change.
4. Continue to print other files to PDFs via PhantomPDF printer. All the result PDF files will be appended into the Print job in the left side navigation panel.