A family of Microsoft word processing software products for creating web, email, and print documents.
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Also, for whatever reason, I am not seeing customize TOC in References. I see AutoTable1, AutoTable2, and Manual (Word 7).
Word 2007 and 2010 do not contain the "Custom Table of Contents" in the menu but rather "Insert Table of Contents..."
The screenshot above is from my Generating a Table of Contents and has the Custom Table of Contents... line inserted.
You can also add it using the Insert > Quick Parts > Fields and choosing Table of Contents.