Thread:Project:Support desk/Subpage Return Question

On one of the wikis I frequent, there's a function which places return links to parent pages. I was wondering how to do that on my wiki. For example, the wiki does the following:

Parent Page: Blah Blah

Sub Page: :Blah_Blah/Whatever

On page Whatever, there is no title bar listing it as Blah_Blah/Whatever, only a small url link that reads < Blah_Blah

How do I activate that functionality?