In thumbnail view we see many photos in a page.
Photos are arranged as mosaic tiles that responds to the size of the viewing device or fixed grids with 2, 3 images across.
There are four basic color schemes. White, light gray, dark gray and black.
The thumbs for images can be treated different than the thumbs for folders. They can be cropped square, rectangular or not at all
Text can be above, below, overlaid or hidden.