A system for displaying electronic content in one of multiple view modes using a web browser client application. Specifically, the web browser client application may present the electronic content in a first view mode in which the content displayed in a content pane that is configured to provide continuous scrolling of the content, and content tree content is displayed in a content tree pane. In response to a request to display the content of the page in a second view mode, the content is displayed in a full-screen pane that covers a substantial entirety of an available display area. The full-screen pane is configured to provide toggle-based navigation in which a user input automatically advances a display of the content to a respective topic portion identified within the content.