How to remove the underline from the files?

[Alberto Trujillo]

Hi everybody:

I know that this is a simple question, and even I could resolved the 
problem when I was working with kde. But now in Kubuntu I can't find 
where is the option to remove the underline from the files. I have 
checked the System Settings menu a couple of time, but without any luck.

Could anybody tell me how to remove it?

Thanks a lot.