Tags in Acrobat Headers / Footers

I'm combining multiple PDF files as a single document.

There is a tag for each section (each original document). I have added a tag under each major tag, and want the Title of the Sect tag to display in the footer. I believe that the text should change as the document progresses from one section to the next.

Seems as though I haven't figured out the correct syntax yet, or this can't be done.

I'd appreciate any suggestions or comments.

TIA,
Robert