preview

noun

1. An experience of something in advance.

   “It is tempting to speculate about the incentives or compulsions that might explain why anyone would take to the skies in [the] basket [of a balloon]: perhaps out of a desire to escape the gravity of this world or to get a preview of the next; […].”

2. (colloquial)An advance showing of a film, exhibition etc.
3. A short collection of clips edited together to advertise a film, television show, etc.; a trailer.
4. Something seen in advance.
5. A facility for viewing and checking a document or photo, or changes to it, before saving or printing it.

verb

1. (transitive)To show or watch something, or part of it, before it is complete.

   “Vidal's talk was caled "The Screening Of History," and it was a free-ranging meditation on the United States, the movies, on Vidal's personal history and numerous interconnections. (It also previewed a forthcoming book by the same name.)”

2. (transitive)To show something in advance, a facility for viewing and checking a document or photo, or changes to it, before saving or printing it.