Document Map is an alternative to Outline View. It uses the same outline levels as employed in an Outline View. It is shown along the left side of the document window. It is known as Document Navigation Tool. Thumbnail and Document Map cannot be viewed together.
Thumbnail is a pane that appears along the left side of the document window. It shows the pictures of each page in the pane on which a user can click and go directly to the clicked page. It is also known as Document Navigation Tool.
