What tool is generally used to display matching text in a document when searching for specific words?

The Navigation pane is the tool specifically designed to help users find specific words or phrases within a document. When searching for text, the Navigation pane allows for easy access to instances of the search term. It typically highlights the matches and provides a convenient way to jump directly to each occurrence, enhancing the efficiency of reviewing longer documents.

Other options like the Text box, Review pane, and Footnote manager serve different purposes. The Text box is used for placing text in a designated area, the Review pane is focused on tracking changes and comments made during the editing process, and the Footnote manager deals specifically with managing footnotes in a document. Therefore, the Navigation pane is the most appropriate and effective tool for displaying matching text during a search.