Select the text you want to turn into a link and then click on the Insert Link icon in the tool bar. An option box will appear where you can enter in the link. The link can be the name of an article in the wiki or a http://url on the world wide web.

File:Link.gif

Inserting a link of the file in the wiki

All files are treated like images in the wiki. You can use the 'insert image' button and enter in the file name. Or just in wiki text [[Image:Filename.extension]] or [[Media:Filename.extension]]