\setupinteraction
  [state=start]

\setupinteractionscreen
  [option=bookmark]

\definelist
  [mylist]

\placebookmarks
  [chapter,mylist]
  [chapter,mylist]

\starttext
    \startchapter[title=Messing Around]
        \bookmark[mylist]{luigi is messing around again}\input zapf
    \stopchapter
\stoptext
