This is called the Places Bar. See
http://www.gmayor.com/customize_the_word_places_bar.htm

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Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
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> When the "Save As" window appears for me to save a document, there is a gray
> colored vertical bar on the left side of that window with a list of folders.
> How can I either replace or add a folder to that list of icons?