Windows 10’s preview thumbnails are incredibly useful if you have confusing file names, but those who are well-organized may just find them an annoyance. For the unfamiliar, preview thumbnails in Windows 10 are the little icons that show for every image and video. It’s worth noting that preview thumbnails only appear when you have medium, large, or extra-large icons selected, so changing that is always an option. Disable Windows 10 Preview ThumbnailsSwitch to the “View” tab and tick/untick “Always show icons, never thumbnails”, and “Display file icon on thumbnails”. Enable or disable File Explorer thumbnailsClick the “Visual Effects” tab and untick “Show thumbnails instead of icons” under the “Custom:” heading.