If you SaveAs a document with the choice of filename you want to use, then the PDF would adopt that name. However this is likely to give you a second copy of the original file that you might then wish to delete.

I recently created http://www.gmayor.com/email_document.html which is essentially an alternative to save and send, albeit using a slightly different process which includes the default signature for the e-mail account. It might make an interesting update project to provide an option to choose or change the filename of the attachment. What did you have in mind?

P.S. I liked the idea of renaming the attachment, so have implemented it at the above link.

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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