Drawing views are identified by the OHandle ProView. This is the same object handle used to reference 3D model views, accessed by the functions in ProView.h, but there are no cases where the same object can be accessed by both types of function. The general rule is that functions for 3D views are in ProView.h, and start with ProView; functions to manipulate drawing views are in ProDrawing.h and therefore always start with ProDrawing.

Each drawing view has a solid attached to it. The same solid can appear in more than one view. Some solids may be attached to the drawing, but not appear in any view, if the user has deleted all views of it without also removing the solid itself from the drawing.