Which line indicates movement or alternative positioning for an object?

The movement or ghost line is specifically designed to indicate movement or alternative positioning for an object in technical drawings and plans. This type of line is typically drawn in a dashed format and shows how an object can be moved or how it will appear in a different position without overcrowding the main drawing. The use of a movement or ghost line allows for flexibility in the representation of assembly or installation options, making it easier to convey design intent to others involved in the project.

In contrast, centerlines help to identify the axis of symmetry in a component, while break lines indicate that a section has been intentionally removed from the drawing for clarity. Dashed lines can serve multiple purposes, such as indicating hidden details but do not specifically denote movement the way a movement or ghost line does.