What are tabs used for in theatre productions?

Tabs are specifically designed as horizontally suspended curtains that help conceal the stage from the audience's view. Their primary function is to provide a visual curtain that allows for scene changes, costume adjustments, or set modifications without the audience seeing these backstage activities. Tabs often serve a dual purpose of enhancing the aesthetic presentation of a production while also maintaining the illusion of a polished performance.

While other options may involve various aspects of a theatre production, they do not accurately describe the primary use of tabs. For instance, sound quality enhancement is typically achieved through microphones and sound equipment, not curtains. Similarly, while actor entrances are crucial to a production, they are generally facilitated by other types of curtains or staging techniques rather than the tabs themselves. Finally, lighting adjustments are conducted through lighting fixtures and controls, not by the presence of curtain elements such as tabs.