A full section is a type of section view in which an object is imagined to be cut entirely in half by a straight cutting plane, typically along its centerline. Everything in front of the cutting plane is removed, and the view shows the remaining portion as if you are looking directly at the cut surface. This method is especially useful for symmetrical objects or parts with internal features that run the length or width of the object, such as bores, keyways, or internal walls.
In a full section, the cutting plane is usually vertical or horizontal and aligned with a principal axis of the object. The result is a clear, direct view of the object’s internal structure, without hidden lines. The surfaces that are intersected by the cutting plane are filled with section lining (also called hatching) to indicate solid material. Because the cut exposes features that would otherwise be hidden, a full section often replaces the standard external view in a drawing to reduce complexity and improve clarity.