[NTG-context] How to scale fonts?

Hello, I want to use truly huge (40pt) fonts for chapter numbers. In my latex code, I used \newfont{\chapterNumber}{pplr9d scaled 7000} From the context manual, I thought that \definebodyfont [11pt] [rm] [ tfH=cmr12 scaled 7000] should do it. Though the above code doesn't throw any errors, it doesn't do anything. What am I doing wrong? *MWE* \definebodyfont [11pt] [rm] [ tfH=cmr12 scaled 7000] \starttext {\tfH 1} \stoptext Devendra