VtProjectionType provides viewpoint and perspective options for displaying and viewing a chart.
| Constants | Description |
| VtProjectionTypePerspective | This provides the most realistic three-dimensional appearance. Objects farther away from you converge toward a vanishing point. This is the default projection. |
| VtProjectionTypeOblique | This is sometimes referred to as 2.5 dimensional. The chart does have depth, but the xy plane does not change when the chart is rotated or elevated. |
| VtProjectionTypeOrthogonal | Perspective is not applied in this three-dimensional view. The major advantage of using this type of projection is that vertical lines remain vertical, making some charts easier to read. |