It's easy to preview files without opening them in Windows 10 thanks to the Preview Pane feature in File Explorer. You can see thumbnails of most images, videos, audio files, and some text-based documents. Here's how to turn it on. First, open File Explorer. To do so quickly, press Windows+E, or click the folder icon in your taskbar if File Explorer is pinned there. You'll also find File Explorer in your Start menu. In the menu bar at the top of the File Explorer window, click "View." Find "Preview pane" in the upper-left region of the toolbar and click on it. The Preview pane is now activated. Navigate File Explorer to a folder that has documents you'd like to preview. When you select a file, you will see its preview thumbnail in the right side of the window. File Explorer also has a related feature called Details Pane. To turn it on, click "View" in the Explorer menu bar, then click "Details pane" in the toolbar (it's right next to the Preview pane option). When you highlight a file with Details pane turned on, you will see a tiny thumbnail (for applicable file times) and some details about the file, such as its size or the date created, in the right portion of the window. It's also possible to quickly toggle the Preview and Details panes using keyboard shortcuts. Here's how. RELATED: How to Use File Explorer Without a Mouse on Windows 10 Microsoft's free PowerToys for Windows 10 can add support for additional file types to the Preview Pane, including SVG images and text documents formatted with Markdown.A Keyboard Shortcut for Viewing the Preview and Details Panes