A preview window is a small, interactive display on a computer or mobile device that allows users to view a preview of a file or document before opening it. This feature is commonly found in software programs such as photo editors, video editors, and document viewers. The preview window provides a quick and convenient way for users to get a glimpse of the content without fully opening it, saving time and effort. It often includes basic navigation tools, such as zoom and scroll, to allow users to examine the content in detail. The preview window is especially useful for previewing multiple files at once, allowing users to easily compare and select the desired file. Overall, the preview window enhances the user experience by providing a visual preview of the content, making it an essential tool for efficient and effective file management.