Preview files and folders
You need to have Sushi installed on your computer to perform these steps.
You can quickly preview files without opening them in a full-blown application. Select any file and press the space bar. The file will open in a simple preview window. Press the space bar again to dismiss the preview.
The built-in preview supports most file formats for documents, images, video, and audio. In the preview, you can scroll through your documents or seek through your video and audio.
To view a preview full-screen, press F or F11. Press F or F11 again to leave full-screen, or press the space bar to exit the preview completely.