

Navigating documents, like PDFs, can sometimes be difficult when you are just scrolling page after page, paragraph after paragraph. Fortunately, the Content Inspector provides two views that make it easier to move through your documents: a Table of Contents for various types and Thumbnails for PDF documents.
The Table of Contents shows an outline view of PDFs with an table of contents, chapters in .epub files, section headings of Markdown documents, or sections in rich text created with emboldened or underlined lines. Browse the outline as you would in outlining applications, expanding and collapsing sections to access the desired pages. This inspector also supports selecting multiple pages, which could be useful if you need to copy page links via the context menu.
For even quicker navigation, the table of contents can be navigated via keyboard, using the arrow keys to move around. Change pages with up and down arrows. Expand and collapse a section with the left and right arrows or hold the ⌥︎ Option key to fully expand or collapse sections.
When used with Markdown, rich text, and PDF documents, you can drag and drop sections and it will rearrange the text in the document.
Context Menu: The context menu commands available in this inspector depend on the type of document:
PDFs:
PDFs and supported types:
.epub files support page links. Markdown supports section links. Rich text supports paragraph links.
Used only with PDF documents, the Thumbnails view show each page in a list of thumbnails. This allows for a more visual approach to moving through your document. By default, the thumbnails are shown in a single column but they can be displayed in multiple rows if the sidebar is widened. This view allows for actions like these:
Context Menu: You also have several options available in the context menu when you Control-click in the Thumbnails view:
PDF Bookmarks: The Add to Table of Contents command mentioned above allows you to add bookmarks to specific pages. If there is no table of contents, one will be created. With the option of reorganizing and renaming items, you can create a very custom table of contents specifically for you.