Almost everything important in Netscape Communicator 4.7 is accessed through the Edit Menu -> Preferences section. The drop-down directories on the left include a Navigation, Mail and Advanced section. You may clear the cache & history in the Navigation and Advanced sections. The Navigation section is also
where you set Netscape's home page. The Proxy settings may also be set in the Advanced section.
Navigation Settings
Click on the Edit menu and choose Preferences as shown.