Final answer:
A sectional view is a drawing technique in architecture where a section of the building is cut away to show its internal structure and components, such as columns, windows, and bays.
Step-by-step explanation:
A sectional view is a type of view provided where a section of the building is cut away to expose the hidden areas. This technique is often used in architectural drawings to provide a clear understanding of the internal structure of a building, which might otherwise be obscured. For example, sectional views can expose the structural elements like columns, beams, and the relationships between various building components such as clerestory windows, bays, and arcades. In the Gothic architecture featured in many European cathedrals, a sectional view might reveal the different architectural elements like the nave, the triforium, and the clerestory levels, enabling a better appreciation of the design's complexity and the way light filters through the building.