What is known as the part of the available space occupied by the set and/or used by actors during a performance?

The term that refers to the part of the available space occupied by the set and/or used by actors during a performance is "acting area." This concept encompasses the physical space where the performance unfolds, including both the stage and any areas designated for actor movement and interaction. Understanding the acting area is essential for actors as it dictates their positioning, movements, and the overall spatial dynamics of the performance.

In theater, the acting area is designed not only to accommodate the action but also to create visual impact and maintain sight lines for the audience. It is a crucial aspect of stagecraft that ensures effective storytelling through spatial awareness.

The other terms, while related to theater, do not describe the occupied performance space in the same way. The "set" refers to the physical scenery and structures used on stage, "sight lines" relate to the audience's view of the stage, and "set dressing" involves the decorative elements added to the set to enhance its visual appeal. Therefore, the acting area is the most accurate term for the space actively utilized by performers during a performance.