Hi there,
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Not supported, you could try to print the note as a pdf (File -> Print) and activate page numbering, but I didn't find such an option myself under Windows or Debian. There is no other option, that I am aware of, see this thread: Pagenumbering in PDF-Exports
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Markdown doesn't support this, but you may take a look at this thread: How to create a new page for PDF export
Best regards