PDF documents may be displayed in the Web Client using either the web browser's configured PDF viewer (typically a built-in viewer or browser extension) or the Web Client PDF viewer. The Web Client PDF viewer allows you to use standard Document Viewer toolbar and right-click functionality, such as applying notes and annotations to specific positions. It also provides a Bookmarks pane that can be expanded to view the PDF document's bookmarks.
Depending on your system's configuration, you may be able to choose the type of PDF viewer used in the Web Client.