Final answer:
The claim that quick costume changes are only a concern for the stage manager is false; costume designers also play a crucial role in facilitating these changes by designing costumes that can be changed quickly and efficiently.
Step-by-step explanation:
The statement that quick costume changes being a concern for the stage manager, not the costume designer, is false. Although the stage manager plays a critical role in the logistics and execution of a theatrical production, including overseeing quick changes during live performances, it's also the responsibility of the costume designer to ensure that the costumes are designed for ease of change. Costume designers must consider the practicality of quick changes when creating their designs. For instance, they might use Velcro instead of buttons to allow for faster costume changes. Moreover, during dress rehearsals, any issues with costumes are addressed by both the designers and the stage crew to ensure a seamless transition during actual performances.