Easy
Long pipes or poles from which curtains, lights, or flats are hung.
Battens
Two-dimensional painted wooden set pieces usually used to suggest a room in a house, a tree, etc
Scenery (flats)
Scenic design (also known as scenography, stage design, set design, or production design) is the creation of theatrical, as well as film or television scenery.
Set
A signal for something to happen
Cue
In theatre, a platform (also referred to as a riser or rostrum) is a stationary, standard flat walking surface for actors to perform on.
Platform
the group of people working on set construction, props, lighting, sound, costumes, and makeup
Stage Crew
scenery hung at back of stage
backdrop
A prop, formally known as (theatrical) property, is an object used on stage or on screen by actors during a performance or screen production.
Property (prop)
In film terminology, throw is the distance between a movie projector lens and its screen. It is the distance the image is thrown onto the screen, and it has a large effect on screen size.
Throw