Constraining Section Lines

If infer constraints are turned on (CONSTRAINTINFER=1) at the time you create the
section view, constraints are inferred between the view geometry and the section line.
When view updates take place, the constraints ensure that the section line retains
its position in relation to the features it highlights. In some cases, you may require
constraints that are more complex than the inferred constraints. For example, a section
line that must pass through 15 mm from a given edge. In such cases you can manually
constrain the section line to the view geometry, using a special edit environment
known as the “symbol sketch mode”. The sketch mode allows you to add additional geometry
to assist you constrain the section line. This geometry is considered construction
geometry and is visible, only in symbol sketch mode.

Component Participation in Section Views

Components cut by the section line are hatched in the section view. Mechanical engineering
drafting practices demand that components such as fasteners and shafts must not be
hatched (sectioned).

Accordingly, the VIEWSECTION command detects Inventor content library components
and does not section them. However, AutoCAD 3D models do not contain metadata to explicitly
identify components such as shafts or fasteners. Hence, you must manually select such
components and exclude them from being sectioned.

Projecting Views from Section Views

Like from any other drawing view, you can generate projected views from a section
view. However, only isometric projected views inherit the cut, by default. Orthogonal
projected views do not inherit the cut. As such, the orthogonal projected view of
a section view is a complete view.

Isometric projected views of a section view are not controlled by section view styles.
Instead, they inherit properties such as scale and hatch properties from the parent
section view.

Modifying Section Lines

When you move a section line, the corresponding section view updates. When you change
the angle of a section line, the section view moves to maintain alignment with the
section line.

If you delete the section line, the corresponding section view is also deleted. Similarly,
if you delete the section view, the corresponding section line is also deleted.