Which component is specifically designed to change the elevation of stage elements?

The component specifically designed to change the elevation of stage elements is the counterweight system. This system uses weights and pulleys to allow for smooth and controlled vertical movement of scenery, lighting, and other stage elements. It provides a balance that makes it easier to raise or lower heavy objects with minimal effort, ensuring safety and precision in theatrical productions.

The counterweight system typically consists of a grid, where counterweights are added or removed to achieve the desired balance for the flown rigging, allowing for easy adjustments during a performance or rehearsal. This makes it an essential tool in technical theatre for managing elements that need to be elevated such as backdrops, lights, and other set pieces.

Other components like a winch can also adjust elevation but are generally more mechanical and may have limitations on weight capacity compared to a counterweight system. Switchboards control electrical systems, and tracks are used primarily for horizontal movement rather than vertical elevation adjustments.