представление надстройки в основном приложении(In the .NET Framework add-in programming model, an assembly that contains interfaces or abstract base classes, and represents the host's view of the methods and types used to communicate with an add-in)
перспективное поле зрения(A view that changes the amount of the content that is visible through the camera and the amount that objects in the document appear to be distorted by the camera. Small values will reduce the amount that an object is distorted by perspective and large values will cause objects to become very distorted as with a fisheye lens)
