See also Fly Tower. The area above the stage where scenic pieces are stored out of sight. Often further delineated by the maximum trim height of a batten: A theatre with Full Flyspace will have a grid two to two-and-a-half times the height of the proscenium or typical trim of the Grand Valance. A theatre with Half Flyspace will be one-and-a-half times as high as the proscenium. A theatre with No (or Zero) Flyspace may have battens and a counterweight system, but the maximum high trim will be just slightly above that of the proscenium (battens can fly in but not out, above normal playing trim).