Which aspect does NOT fall under the responsibilities of a stage manager?

The role of a stage manager is crucial in the smooth functioning of theatrical productions, and it typically encompasses various responsibilities. One of the key aspects is calling cues during performances, which involves signaling actors and crew members to ensure that lighting, sound, and other technical elements occur at the right moments. Additionally, managing the rehearsal schedule is a primary task, ensuring that all cast and crew members are informed of when and where rehearsals take place.

Another significant duty of the stage manager is to facilitate communication among the cast and crew. This includes disseminating information, addressing concerns, and ensuring everyone is on the same page, which is vital for a cohesive production.

However, acting as the lead performer falls outside the typical responsibilities of a stage manager. A stage manager's focus is on the organization and coordination of the production, rather than performing on stage. Therefore, this option is correct as it identifies an area that does not align with the core duties of a stage manager.