What is "Parametric Drawing" in AutoCAD?

Parametric drawing in AutoCAD refers to a technique that utilizes constraints to maintain geometric relationships between objects. This means that when you create a drawing using parametric techniques, you can define specific relationships, such as dimensions or angles, which will automatically adjust the shapes involved if you modify one of the elements. For instance, if you set a constraint that keeps two lines perpendicular, any movement of one line will automatically adjust the position of the other line to maintain that perpendicular relationship.

This method enhances design efficiency by allowing for quick adjustments while preserving the overall structural integrity and relationships of the design elements. Parametric drawing is particularly beneficial in scenarios where multiple components need to work together cohesively, as it provides a dynamic way to respond to changes throughout the design process.

In contrast, the other options refer to methods that do not involve the dynamic relationship management that parametric drawing provides. Freehand drawing does not involve constraints or relationships, automatically filling surfaces focuses on filling areas without regard to underlying geometric relationships, and exporting drawings to text files is unrelated to the drawing process itself.