Citations in MS Word 2010 Footnotes: Field Switches not available.

Sep 11, 2013 at 7:00 PM
I've just started using a BibWord stylesheet in a document that uses footnote references.
The citations will insert into a footnote, but in Word 2010 the field switches are not available in the footnote citations as they normally are in running text citations.
When right clicking in the citation field in a footnote citation, the usual 'Edit Field' option doesn't show.
Anyone got any advice on how to use field switches in a footnote citation?