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

To create a section view in the draft environment, the first element that must be added is a cutting plane. The cutting plane serves as the visualization reference that indicates where the section view will be taken from the model. This is essential because the cutting plane defines the actual slice through which the view is created, allowing users to see internal features of the part or assembly.

Once the cutting plane is established, the section view can be generated, effectively detailing how the part is configured internally at that specific location. The accuracy of this view is reliant on the correct placement and orientation of the cutting plane. This foundational step ensures that the subsequent views generated (like the detail section marker or dimension lines) accurately represent the geometry of the model according to the defined section.