thumbnail
Since a shorter or longer loading time is required for loading graphics, depending on their file size, graphics are displayed in a reduced thumbnail view as a preview in some applications.
This type of display is called thumbnails, which refers to the size of a thumbnail. Thumbnails have a much smaller file size, which reduces download times.
Thumbnails are used, among other things, on the Internet and in Windows Explorer and show the viewer the original image in a reduced form.