See here for location:
http://word.mvps.org/faqs/formatting/footnotefaq.htm
6. Text After Endnotes
You ought to be able to print just the part of the document that has the
index, but with a multi-section document, it can be complicated. See the
Help topic "Print specific pages and sections". If the index is in its
own section, it may be a bit simpler.
EBC wrote:
I am working on a long document. I would like to print out the index
separately from the text. I cannot insert it after the endnotes in the
document or print it out separately. How can I do both?