What is the term used for the area that frames the performance as seen by the audience?

The term that describes the area that frames the performance as seen by the audience is the proscenium arch. This architectural feature serves as the "fourth wall," creating a distinct boundary between the audience and the performers. It enhances the visual experience by framing the stage action, making it more theatrical and focused for the viewers. The proscenium arch often supports the stage's scenery and lighting, contributing to the overall aesthetic of the production.

In a traditional theater setup, this arch allows for a clear view of the performance, ensuring that the audience can engage with the show from a frontal perspective. It helps to delineate the performance space and emphasizes the action taking place within it, thereby enhancing the dramatic effect of the performance. The proscenium stage itself is commonly used in many theatrical presentations, making this term vital in the context of theatre arts.