Word processing programs of any type usually share the most basic features. They universally reserve most of the screen for the text being edited. Most word processing programs also contain a menu structure with most of the programs commands available in a hierarchical organization scheme. Many word processors have graphic toolbars with icons representing the most critical commands. Almost all such programs have scroll bars or some other mechanism for allowing the user to move around in large documents. All word processors also have a cursor, which is usually a small box or line, which shows the user where in the document she is currently typing.