Thumbnails are displayed on the Pages Panel. A thumbnail is a miniature of the page image. A set of thumbnails gives you an overview of your PDF document. The thumbnail of the current page is shown with a blue border and a red frame dynamically indicates which part of the page is currently displayed in the Document Panel. Resize the red frame to change the page display.
Note:Page-level operations are always carried on the selected page.
In addition to quick navigation, use this panel for document assembly. Right-click the panel or click the Options button at the top of the panel, and choose to
Insert files at a set location
Delete pages
Rotate pages
Number pages
Print pages
Enlarge / reduce page thumbnails
For more details see Page-level operations and Thumbnail operations.