\setupheads
  [alternative=inmargin]

\setuphead
  [chapter]
  [style=\bfb]

\setuphead
  [section]
  [style=\bfa]

\setupitemize
  [1]
  [inmargin,packed]

\setupnumbering
  [alternative=doublesided]

\starttext 

\chapter {This or That}

\section {Such or so}

One of the oldest commands concerns typesetting itemized 
lists. Although in principle all settings can take place at 
the location of an itemization, it sometimes makes sense to 
to this at the document level. 

\startitemize
\item one 
\item two
\item three
\stopitemize

Here we put the first level it item marks in the margin. To 
save space we also pack them. Whenever you find yourself in a
situation of setting things up, you should ask yourself if it
would make sense to do it at the document level. A clean 
document source in general leads to a more consistently 
typeset result. 

\stoptext 
