Thread:Project:Support desk/Change media icon size

Hi. First of all I hope I am using the correct terminology, please excuse me if I'm not.

I would like to know how to change the icon size for file types mediawiki does not make previews of e.g. Excel spreadsheets and PDF files, both on the file page and on the list that is created by adding the files to a category. Currently they are 120 x 120px which is too large for a long list of files.

Thanks for your help.