he meant how to map in different modes though lul
go to song settings and in thr last tab (its called advanced i believe) you can switch the gamemode in which you want to map
note that only mania has fully seperate map editor, taiko and ctb use standard's editor
ctb works well, really wonky, but taiko is simple - whistles and claps turn the notes to blue ones, and finishes make the notes big (you also dont have to care where you place the notes)