What feature allows users to navigate through a document easily?

The Navigation Pane serves as a powerful tool for users to easily navigate through a document. This feature typically provides a structured view of the document's content, displaying headings, sections, and even thumbnails of pages, allowing users to jump to specific parts without scrolling through the entire document. It enhances the user experience significantly, especially in longer documents where finding specific information can otherwise be time-consuming.

While other features like a Scroll Bar allow users to move through the document gradually, and a Table of Contents provides a list of topics and their starting page numbers, the Navigation Pane integrates these functionalities into a single, user-friendly interface. Bookmarks can facilitate quick access to specific sections, but they do not offer the comprehensive overview that the Navigation Pane provides, making it easier for users to see the document's structure at a glance. Thus, the Navigation Pane stands out as the best answer for enabling efficient navigation through a document.