For PDF exports, save in PDF 3D format:

This option allows you to convert the selected files to 3D PDF.


Multi-page drawing (PDF):

 


This option allows you to export a PDF document when converting a drawing to PDF format:

  • From the active sheet only.
  • From all the pages in separate PDF documents.
  • From all the pages in a single PDF document.
  • Sheets named in separate PDF documents.
  • Pages named in a single PDF document.


Merge all PDFs into a single file:

If you check this option, all files selected for export will be combined into a single PDF file.

This solution risks generating a large PDF file. It may be preferable to leave the export in separate PDF files and zip these files.