Viewport - 视口
View - 视图
你要的是这个？
To change the view within a Viewport object, you manipulate the view of a viewport you use its member properties. The following member properties allow you to adjust the display of the view in a viewport:
ViewCenter - Specifies the view center of the view in the viewport.
ViewDirection - Specifies the vector from the target to the camera of the view in the viewport.
ViewHeight - Specifies the height of the Model Space view within the viewport.
ViewTarget - Specifies the location of the target of the view in the viewport.
置顶卡
