AutoCAD usually begins a new drawing using a single tiled viewport that fills the entire graphics area. You can split the drawing area of the Model tab to display several viewports simultaneously. For example, if you keep both the full and the detail views visible, you can see the effects of your detail changes on the entire drawing. In each tiled viewport, you can do the following:
AutoCAD 通常使用充满整个图形区域的单个视口来开始一个新图形。可以拆分模型标签的图形区域以同时显示多个视口。例如，如果同时显示整个视图和详细资料视图，则可以在整个图形上查看细节更改的效果。在每个平铺视口中，都可以进行以下操作：
You can display tiled viewports in various configurations. How you display the viewports depends on the number and size of the views you need to see. Tiled viewports in model space are stored in the Viewport table
可以使用不同的配置来显示平铺视口。视口的显示方式取决于所需的视图数量和大小。 模型空间中的平铺视口保存在视口表(ViewportTable)中。
For further information and illustrations describing viewports, see “Set Model Space Viewports” in the AutoCAD User's Guide.
有关描述视口的详细信息和图解，请参见《AutoCAD 用户手册》中的“设置模型空间视口”。
Tiled viewports are stored in the Viewports table. Each record in the Viewports table represents a single viewport and unlike other table records, there might be multiple Viewport table records with the same name. Each of the records with the same name are used to control which viewports are displayed.
平铺视口保存在视口表(ViewportTable)中。视口表中的每一个记录代表一个视口，并且与其它表记录不同的是视口表记录有可能同名名。同名的每条记录都用于控制视口的显示。
For example, the Viewport table records named "*Active" represent the tiled viewports that are currently displayed on the Model tab.
例如：命名为“*Active”的视口表记录代表当前显示在模型标签中的平铺视口。
