\setupbodyfont
  [dejavu]

\starttext

    \startfrontmatter

        \blank \type{criterium=all}             \blank \placelist[chapter][criterium=all]
        \blank \type{criterium=frontmatter:all} \blank \placelist[chapter][criterium=frontpart:all]
        \blank \type{criterium=bodymatter:all}  \blank \placelist[chapter][criterium=bodypart:all]

        \chapter{Intro}
    \stopfrontmatter

    \startbodymatter
        \chapter{One}
        \chapter{Two}
    \stopbodymatter

\stoptext

