preview
n. countablen. a quick look at something before it is finished or officially released. You use this to check how a document or video will look to other people.
n. an advance viewing or examination of something before it is made available to the general public. In a computing context, it refers to a feature that displays a document or file as it will appear when printed or published.
Check the print preview before you click the button.
The software developer released a technical preview of the new operating system to gather feedback from early testers.
By utilizing the live preview feature in the web editor, designers can observe real-time changes to the layout without having to refresh the browser manually.
From pre- + view; compare Old French preveü, past participle of preveoir (“to foresee”).
Often functions as an attributive noun in phrases like 'preview mode' or 'preview pane'.