how to enable the user popup menu

[medienleben]

pls how can i enable this popup menu in showthread?:
http://img148.imageshack.us/img148/5474/quickbanphotogh0.jpg

thx

[Dismounted]

It's enabled by default.

[medienleben]

and is it possible that i shut it down, somehow? is there a option?

i have it, it was a trouble in users...