When reviewing a Microsoft Word document with many pages you may find yourself constantly scrolling up/down or using the Page Up/Page Down keys. To aid in navigating large documents Microsoft added the Navigation Pane starting with Word 2010.
The Navigation Pane is only available when a document contains Heading styles. At a minimum a document must utilize the Heading 1 style. The Navigation Pane will also recognize and use the higher heading styles (2,3,…).
To use the Navigation Pane you must ‘turn it on’ by checking the Navigation Pane check box in the Show section of the View tab on the ribbon.