History expiration can be changed. The buttons are icons, or pictures, that allow you to use Navigator features and options. They usually mimic the menu options. Again, depending on the version that you are using, these buttons may appear in somewhat difference form. Button Action Bookmarks View your bookmarks and open a page.
Location displays the Internet address of the current Web page.
Back Left arrow. Revisit previous pages. Forward Right arrow. Revisit previous pages. Reload Curved Arrow.