outliner
/ˈaʊtˌlaɪnər/ or /ˈaʊtˌlaɪnər/Definitions
1. noun
A person or thing that outlines or produces an outline, especially of a plan or document.
“The project manager was the outliner, responsible for creating a detailed plan for the team to follow.”
2. verb
To create or produce an outline, especially of a plan or document.
“She spent hours outlining the report, making sure to include all the necessary details.”