2.90:Document Viewer (UI Element)
The Document Viewer allows users to—you guessed it—view documents! It comes equipped with several different tools and settings that let you see what you need to see the way you need to see it.
Tools
The Document Viewer toolbar runs along the top of the pane on the right of the screen, just above the document you are viewing. (Some buttons do not apply to certain file types and will be hidden in those contexts.)