computer-aided design or computer- aided drawing , the use of a computer to create, modify, o analyze a design, typically in an engineering or architecture field .

​

​CAD

additional projected view typically used to clarify off-axis features in an engineering drawing .

​

​Auxiliary view

.Bottom-Up modeling focuses on the individual parts that make up an assembly.

​

​bottom- up modeling

​In Top-Down modeling, the focus is on the assembly, and the individual components are modeled around the entire assembly.

​Top-down modeling

​A bevel or chamfer is. an angled line that meets the endpoints of two straight 2D objects.

​Chamfer