Close the database in the currently active network window; if it has not been saved, a dialog box will appear to give the user the opportunity to save it before closing.
You can also get a pop-up menu with the New Database and Open Database options by using "Right Click" in the editing window workspace, outside of the editing windows.
A new database or a previously created database must be opened before any network drawing can be done.
If the exit box 
on the network window is clicked, the network window is closed and the network is closed. If the network has not been saved, a dialog box will appear to give the user the opportunity to save it before closing. This performs the same function as the File|Close Database menu option.