To open the Content Browser: Click 
.
The Content Browser window usually is divided into two panes (Web pages displayed in the Content Browser occupy the entire window). Tool catalogs and their contents are displayed in the right pane. When you start the Content Browser, your personal catalog library, named <user_name>’s Catalog Library, is displayed in the right pane. The left pane is used for navigation, searching for tools, sorting catalogs, and filtering catalog display. The buttons at the top of the left pane work much like the equivalent controls in a Web browser. Click 
to display the top level of the catalog library in the right pane. This is a view of either all the catalogs in the library, or a group of catalogs filtered by type.
You can have more than one instance of the Content Browser open at a time. To open an additional Content Browser window, press Ctrl+N. For more information, see Working with Multiple Content Browser Windows.