The Navigator displays all types of objects contained in a document. If a plus sign appears next to a category, this indicates that at least one object of this kind exists. If you rest the mouse pointer on the category name, the number of objects is displayed in an extended tip.
“导航”显示文档中包含的所有对象类型。如果分类旁边显示一个加号，则表示至少存在一个此类对象。如果将鼠标指针停留在分类名称上，会在说明文中显示对象的数目。