The Status Bar at the bottom left of the display screen prompts you to: Select a view or view sketch.
You are prompted to enter the endpoints of the section line. Draw a vertical line that starts above the view geometry, extends below the view geometry, and passes through the middle of the part.
As you move upwards, notice the dotted line extending from your cursor to the middle of the part. This dotted line lets you know that you are aligned with the midpoint of the line that was located under the green ball. If you move too far to the right or the left as you move upwards, you are no longer aligned to that point, and the dotted line disappears.
During the creation of a section view, you can use Inventor ability to infer geometric relationships while you sketch your section line. In this example, you used a single, straight line. In other more complex cases, you will use a multi-segment line that passes through key points of multiple features.
A section view is created, and a label is positioned that identifies the view and indicates the view scale. This view label is optional and can be repositioned and edited after placement as required.
You will now place dimensions and other annotation on your drawing.