Which term describes the practice of determining visibility on stage from various audience seats?

The term that describes the practice of determining visibility on stage from various audience seats is "sightlines." This concept is crucial in theatre design and staging, as it ensures that all audience members have an unobstructed view of the performance, regardless of where they are seated.

Sightline analysis involves mapping out the lines of sight from different seats in the audience to various parts of the stage. Designers and directors must consider factors such as the height and angle of the stage, the layout of the seating, and any potential obstructions that could hinder visibility. By prioritizing sightlines, productions enhance audience engagement and ensure that the storytelling is fully experienced by everyone in attendance.

In contrast, stage design refers to the overall aesthetic and layout of the performance space, while audience layout could refer more generally to the arrangement of seating rather than the specific visibility aspects. Performance design encompasses broader elements including set, lighting, and costumes but doesn’t specifically target the visibility concerns associated with sightlines. Therefore, sightlines are specifically focused on visibility from the audience's perspective, making this term the most accurate choice for the question.