Present photo previews in a way that is pleasing to the eye.
- Make use of all screen estate
- Beautiful layout
- Allow time/location based grouping.
Rectangular thumbnail grid
For a long time Instagram carried the constraint of only allowing square crop on all photos. Non square photos get cropped now.
Flickr Camera Roll
Flickr introduced new historical view that uses rectangular thumbnails:
Fixed height grid
Flickr also uses a "magic grid" for mixed aspect photo sets. It always keeps the height of all thumbnails constrant but also does smart cropping to justify the indentation per row.
Google Photos on the web seems to be following the same constraints in their thumbnail grid.
Centered Original Aspect
Apple Photos uses original aspect thumbnails centered.
Using square tiles with letterboxed thumbnails and no label.