The design for a scripted performance should take into account anything that the audience can see or hear. Design ideas need to enhance the performance and support the performers in engaging the audience throughout the play.
There are several designer roles within theatre. These are:
Apart from sound, these aspects are collectively known as the visuals, as they are the elements that the audience can see. Although they are all planned by designers, during a performance it is actually the technicians who operate the equipment, eg sound control panels or lighting desks.