Which view type is used for dimensioning features that are not normal to the orthogonal views?

The auxiliary view is specifically designed for dimensioning features that are not parallel or perpendicular to the primary orthogonal views, such as front, top, and side views. When a feature is inclined or at an angle, it can be challenging to accurately represent its dimensions in the standard views. The auxiliary view provides a true shape and size representation of such features, allowing for precise dimensioning.

In an auxiliary view, the feature is projected directly from the corresponding orthogonal view, ensuring that its dimensions can be accurately measured and represented. This is particularly useful in complex geometries where features like holes, curves, or angled cuts may not be effectively depicted in standard views. By using the auxiliary view, engineers and designers can convey necessary details for manufacturing or documentation that may otherwise be misinterpreted in other view types.

Other view types like isometric views or section views serve different purposes and do not provide the same level of accuracy for inclined features directly compared to auxiliary views, making the latter the most suitable option in this context.