[NTG-context] Text Indentation and Space Around Headers

Hi All, I want to indent all text in a document except the chapter header text by a given amount. I have used the following to achieve it: \setupnarrower[left=3cm] and \startnarrower[left] \stopnarrower But I have the feeling that there has to be a better way of doing it. Secondly, how do I control the space around headers? I would like to reduce the big between the chapter header and the first paragraph. Any help will be very much appreciated. Regards, Emmanuel