Pop-up Navigator

The Pop-up Navigator is accessible at the right end of the Tab Bar.
To open it: click the icon, or use the Ctrl/Cmd + Shift + N shortcut.
Note: When you open a new view or new layout, they can either replace the opened one (of the same type, in the case of views), or be opened in a separate new tab. You can change this tab-opening preference in Options > Work Environment > More Options.
Exception: You can have only one Floor Plan and one 3D window open at a time.
Right-click an item to access the Open commands from the context menu
Select an item, then the desired Open or Open in New Tab command from the bottom of the Pop-Up Navigator
The Project Map provides a tree structure of the viewpoints of your Virtual Building Model. A viewpoint represents a window onto a particular part of your project.
The View Map lists saved views. A view is a stored version of a viewpoint; each view is defined by its adjustable View Settings that you configure for a particular purpose as you construct your Virtual Building.
The Layout Book contains the layouts and drawings of the architectural project. A view placed on a Layout is called a Drawing.