[NTG-context] \shiftdown

Hi guys, I would like to move the first capital letter of a term down so that the rest of the term ends up approximately in the centre of the capital letter. The capital letter should be larger than the rest and is not a problem in itself. However, I can't manage this with \shiftdown. It always shifts down at a fixed distance. And I can't work with \setupshift. The inputs of unit=pt, dy=5 etc. don't seem to do anything, at least nothing happens with \shiftdown. Any help would be appreciated Greetings Thomas