What does adding an auxiliary view to an orthographic projection show about an object?

Adding an auxiliary view to an orthographic projection serves to reveal the true shape of features on an object that might not be clearly represented in the principal front, top, and side views. This is particularly useful for features that are angled or tilted, which can appear distorted or foreshortened in traditional orthographic views. By creating an auxiliary view, the designer can provide a more accurate representation of these features as they exist in three-dimensional space, allowing for more precise interpretation and understanding of the object's geometry. This ability to depict true shapes is essential in engineering and technical drawings, ensuring that details are communicated effectively for manufacturing or construction purposes.