To a Footnote in Microsoft Word Microsoft Word lets you add endnotes and footnotes to your document and automatically numbers the notes.
Word considers additional references to a footnote or an endnote to be cross-references.
To enter a reference to an already existing footnote, first place your cursor where you want the reference mark added. To box, then highlight the appropriate footnote in the For Which Footnote box and choose Insert to add the reference. At this point, you'll see the cross-reference in one of two forms. You can move back and forth between the document and the dialog box with Ctrl-Tab or by clicking on the document or dialog box as appropriate. Simply place the cursor where you want the next cross-reference, then move back to the dialog box to insert it.