% example by PR

\setupinteraction[state=start]
\placebookmarks[part, chapter, hiddentitle][part, chapter]
\setuphead[part][placehead=yes]
\definehead[hiddentitle][chapter]
\setuphead[hiddentitle][number=no]

\starttext
  % \setsectionblock[frontpart] % automatic per mid 2015
    \hiddentitle{[Copyright1]}
    \startfrontmatter
        \chapter{Foreword}
        \chapter{Introduction}
    \stopfrontmatter
    \hiddentitle{[Copyright2]}
    \startbodymatter
        \part{First Part}
            \chapter{First Chapter}
            \chapter{Second Chapter}
        \part{Second Part}
            \chapter{Third Chapter}
            \chapter{Fourth Chapter}
    \stopbodymatter
\stoptext
