Preview, Prevue, Purview

I think that most manufacturing and mining should be under the purview of state authorities.” –Rand Paul
You may be invited for a preview of a movie, especially if you happen to be a movie critic or donning one of the roles in the production or direction of the movie.

In computers, preview is the image viewer, a PDF viewer in the operating system. Preview functions as a noun and verb. As a noun, preview refers to an opportunity or an occasion to view something before it is acquired or becomes generally available to everyone or to the audience; seeing something in advance; viewing before others watch something.

Photographers give a preview of the photos of an occasion, or a good, or a product to the concerned before they are published or disseminated. Have you seen the preview of iPhone 7?

Preview means the official showing of a play, a movie, an exhibition of painting or photographs, or any other work of art but before the official opening; a brief description of a future event or occurrence; a short description that is about to happen; an idea of a future event, and how or what it will be like.

Rising temperatures and inconsistent rainfalls are a preview to climate change. If you have seen a preview of a movie, it means you have watched it in advance before other audiences. Some people preview something by paying for the preview (paid preview). In North America, preview or ‘prevue’ refers to a trailer.

As a verb, preview means to see something or watching something in advance (before a movie is released, before an exhibition is opened up to the public); display a product, film, an exhibition before it is made generally available.
Who will get the sneak preview of movies before they are released?

Fashion designers give a sneak preview (to a few people) of their designs to select people in the media and garment industry. Preview is a special screening of a play, show, a movie, a performance which allows some important people to see it.

Purview is the range and scope of a document; range and scope of a scheme; purview is the range of physical or mental vision; an area within which someone or something has authority; the sphere of influence of someone or something over something or somebody; influence.

Purview means have the knowledge of (the area of expertise is within his purview), awareness, acumen, horizon, vision.
Purview is derived from the French word ‘porveu’: purveyed. Is your life under your purview?