How to upload files
From Young Set Theory Network
First check out the categories on the Community portal (link on the left side of this page). The links which have [+] (or [x]) on them are subcategories which already exist and are waiting for you to add your files to them! The text on the link is the name of the category and is case sensitive. Creating categories are a bit harder - we'll work on that later.
Next upload your file using the link on the left side of this page under the heading "toolbox". Please give the destination file an informative title and insert a small abstract in the summary box! Once you've uploaded your file, you will be taken to its wiki page. There you should click on "edit" on the top and at the end of the abstract, insert the following code "[[Category:My Category]]" where "My Category" is replace by the name of the category.
Now your file will appear with a link in the correct category!

