Thread:Project:Support desk/How can I disable the auto generate "other resolutions" function?

http://i.imgur.com/Mi56e.png

Images shows above.

Mediawiki will automatically generate following thumbnails. Those thumbnails took too many disk space of our wiki. How can I disable this function? I tried to delete those thumbnails but once user visit the file page, they will generate automatically.

Size of this preview: 800 × 530 pixels. Other resolutions: 320 × 212 pixels | 640 × 424 pixels | 1,024 × 678 pixels | 1,280 × 848 pixels.