[NTG-context] Underbar

Hello everybody, I have a text, where a couple of lines are typeset with \underbar. — To me this underbar is a fraction to near the text. So I wanted to use \setupbar[…] to change the offset. Unfortunately nothing happens whatever I try. MWE: \setupbar[offset=-.5,dy=-.5] \starttext Hello! \blank \underbar{Good buye!} \stoptext I am using the latest version of ConTeXt from March 11. Do I miss something? Kind regards Willi