12. The system of claim 11 , wherein selecting a particular preview of a particular file in the plurality of files causes the particular preview of the particular file to become a focal point among the displayed previews.
11. The system of claim 8 , further comprising instructions to cause the one or more processors to perform operations, including: displaying previews of the plurality of files, wherein the previews of the plurality of files are arranged in an overlapping manner, and wherein using the displayed previews of the plurality of files includes moving backwards or forwards through the displayed previews.