Final answer:
Above the main stage was the fly loft, used for moving scenery and lights, and the wing space was located on both sides of the stage, used for actor movement and scenery storage. In Greek theatre, the skene provided additional space for character entrances and the roof could be used for performances.
Step-by-step explanation:
Above and on both sides of the main stage, typically, you would find the fly loft and wing space, respectively. The fly loft is a technical space where scenery and lights can be lifted in and out of the audience's view.
Sometimes this system is motorized for efficiency, and in other cases, it might need to be operated manually. The wing space is crucial for actors to make their entrances and exits and to store and move scenery out of view. Ideally, this area is as wide as half the length of the stage to accommodate such movements smoothly.
Additionally, in traditional Greek theatre, the skene was located behind the stage and featured three doors for different characters' entrances and exits, with the central door often being used for main characters. Above the skene, there was often a flat roof which could be used for additional performance space, depicting for instance, appearances by the gods.