[NTG-context] sectioning command with no title

Hi there, I'm trying to get the opposite command to title, that is, numbering with no text. What would it be the best command? I thought \section{~} or \section{\mbox} could do the job, but I wonder whether they might add something that would prevent perfect [align=center] in the title. Thanks for your help, Pablo -- http://www.oudeis.tk