Content Builder contains a collection of 2D drawing and 3D modeling tools. Content Builder lets you create parts by building them component-by-component or by assembling them from primitives (predefined models that represent basic shapes and connections).
When creating a parametric part, you define the features of the part and how they are associated with one another. Each parametric part represents a unique part family. You should analyze the catalog hierarchy to determine the best place to add part families. It is also important to notice the relationships between the different part sizes you want to create. The features you define in the model determine the flexibility you have to create multiple part sizes. You should look at the entire part you want to create, decide how to break it down into simple shapes, and determine the relationships to establish between the different shapes.