I have a document that includes some citations in the text and some citations as footnotes.
I want to include all the citations in an index, whether they appear in the text or as a footnote.
I am adding citations as index entries by going back through the document, highlighting the text, clicking Insert Index Entry, and the clicking Insert.
I have created an alphabetical index, and a user defined index.
Previously, the footnotes would not even be added as Index Entries.
Solved: When Creating the index, be sure to mark “Create From,” in this case “Index marks.” Sometimes that would be marked by default and sometimes not, so I finally figured out that it is necessary to set the index source.