annotator

/ˈænəˌteɪtər/
noun
  1. A person who adds notes or comments to a text or document.
    • As an annotator, she helped clarify difficult legal documents for the team.
    • The online platform connects writers with professional annotators.
    • The annotator carefully marked each important passage in the book.
Synonyms
What does "annotator" mean? | whatsthatwordmean | whatsthatwordmean