Microsoft Office does not provide the ability to do that. You can do it manually with the free version of PrimoPDF, or if you want to do it using VBA you will need a third party application which may be programmed from VBA such as Acrobat or PDFCreator - in the case of the latter I would suggest version 2.5, which is still available to download, rather than the later more bloated version.

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Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com