After installation it displays a thumbnail-size box in one corner of the screen.
From the theatlantic.com
The problem with this image is that it is not useful at ordinary thumbnail size.
From the en.wikipedia.org
Physically though, on the basis of the two tiny thumbnail photos, I'm less sure.
From the guardian.co.uk
One thing I didn't like though was the thumbnail had more referees than players.
From the en.wikipedia.org
Asked what an Abbott government would look like, he gives this thumbnail sketch.
From the smh.com.au
Each one has a thumbnail picture of the bottle, name, style and where it's from.
From the sfgate.com
Use your thumbnail to tear the skin at one end, then squeeze to pop out the bean.
From the sltrib.com
But the thumbnail clearly shows this page will have a bunch of themes for Chrome.
From the techcrunch.com
A thumbnail of a video is enough to have Gazopa find similar videos on the web.
From the techcrunch.com
More examples
The nail of the thumb
Thumbnails are reduced-size versions of pictures, used to help in recognizing and organizing them, serving the same role for images as a normal text index does for words. ...
The Thumbnail, located in Torssukatak Fjord in the south of Greenland, is the world's tallest sea cliff at nearly 1500 meters.
The fingernail on the thumb; A rough sketch (e.g., the size of one's thumbnail); A small picture, used as a compact representation of a larger image; To describe concisely
(Thumbnails) These are miniature pictures sketched as first design ideas like thinking on paper or on the screen.
(Thumbnails) nbsp  Miniature images, resembling slides. Thumbnails are small, low-resolution images, typically used to display search results because they are easy to browse through. When you upload an image to a royalty free stock photography site, it will be displayed as a thumbnail.
(Thumbnails) Small reference images of the shots on a roll, appearing in an index print or on a computer screen.
(Thumbnails) the first ideas or sketches of a designer noted down for future reference.
(Thumbnails) Small versions of an image used for quick overviews that give a general idea of what an image looks like.