After you have selected a project in the Project Browser, you open the Project Navigator to create and edit the actual building and documentation data. Here you create elements, constructs, model views, detail views, section views, and sheets, connecting them with one another.
Note: Although project files and categories you create on the Project Navigator palette are shown as files and folders in Windows Explorer, you should not move, copy, delete, or rename project files from there. Such changes are not updated on the Project Navigator palette, and you could get an inconsistent view of your project data. Any changes you make to the project on the Project Navigator palette are managed and coordinated by the software. Also note that any changes you make on the Project Navigator palette (such as renaming, deleting, or changing the file’s properties) cannot be undone using the AutoCAD UNDO command.