What must be added first to create a section view in the draft environment?

To create a section view in the draft environment, establishing a cutting plane is essential as the first step. The cutting plane acts as an imaginary slice through the 3D model, indicating the location and orientation of the view that will be shown in the section. By defining the cutting plane, you can articulate which part of the model to "cut" and visualize the interior features in the section view.

Following the creation of the cutting plane, additional elements like viewports or drafting layers can be managed, but they build upon the foundation set by the cutting plane. The cutting plane's definition is fundamental since it prescribes how the resulting section view will be presented, including its details and relationships to other views or features in the draft. Hence, without first establishing the cutting plane, there wouldn’t be a defined basis for creating the section view itself.