[NTG-context] margin in TocEntry definition

Hi list, I have: \define[1]\SectionTocEntry{% #1\crlf% title \doifnot{\structurelistuservariable{author}}{}{\structurelistuservariable{author}}%   } which successfully gives me a ToC with: Chapter title Author name But I want the author name indented by .5cm and do not know how to use 'margin' in the above definition, or some other way of getting the indentation. I have tried various versions of 'margin' before the \doifnot part of the definition, but to no avail. Hopefully I can achieve: Chapter title      Author name Julian