CONCLUSION: 1. Different Line conventions are used for different things. 2. A sectional view is used to see what the object is composed of. 3. The purpose of an auxiliary view is to show inclined or oblique surfaces true size. This does not occur in standard views. 4. To be precise and not take up too much space. 5. It can give you the dimension of other components in the object. 6. Mate, Insert, and Flush 7. CAD drawing can be rotated to see all sides in which paper can't.