[NTG-context] Questions about (start)itemize

I started making lists and sublists. In the first startitemize I use an 8 in the setup, because I want squared bullets. For my sublists I use 5, because I want to use circles there. Is there a way not to have to put it everywhere? (When I change to a triangle, I do not want to change it everywhere.) Is there a way to keep items automatically together? At a certain point I started a new sublist. But only the first came on the page and the rest on the next. Because I am printing on A7, it will happen moren often. What is the meaning of KA and KR in the setup. I see a difference, but I do not understand it. -- Cecil Westerhof