to these different themes, and is intended for advanced users only. No Style Removes specialized fonts, colors, and other visual effects from the current page and all future pages visited in the current tab or window. Basic Page Style Displays the current page the way its author intended. This is the default, and the current page can change the name of this command if it wants. The list of additional styles If a Web site provides additional styles, a menu item for each appears here with the name specified by the page author. Click the menu item to choose the style. Character Encoding Allows you to manually specify the language of the Web site you're viewing. In most cases, Firefox can automatically detect the language and display text appropriately. However, if text isn't showing up properly, choose the language from this menu. Page Source Displays the code that created the current Web site. This command is useful only for Web site developers. Shortcut Ctrl+U ( +U on a Mac) Full Screen Hides Firefox toolbars and the system taskbar so you have more room to view the current Web site. Because the menu bar is hidden in Full Screen mode, you can't use this menu item to exit Full Screen mode. Instead, press F11 or click the Restore button (the button in the upper right corner to the left of the Close button). This command is unavailable on the Mac. Shortcut F11 See Chapter 19 for more information about Full Screen mode.             The Go Menu The Go menu (shown in Figure A-5) allows you to return to Web sites you visited recently. Figure A-5: The Go menu. Back Takes you back to the last page you visited in the current tab or window. This is the same as clicking the Back button on the Navigation Toolbar. This command is unavailable when you're viewing the first Web site you visited in the current tab or window. Shortcuts Alt+ or Backspace when the page is selected ( +< on a Mac) Forward Takes you forward one page in history. In other words, suppose you search Ask Jeeves (http://www.ask.com) for improving short-term memory and click the first search result. But by the time the new page finishes loading, you've forgotten what you're doing there, so you click Back to return to the search results page. A few seconds later, you remember again. Now you can click Forward to return to the page on improving your memory - and please, read it carefully. This command has the same effect as clicking the Forward button in the Navigation Toolbar.