In scriptwriting mode, Scrivener automatically adds character names to the auto-complete list as you write. While this is for the most part convenient, it can be a pain if you decide to change a character’s name, or accidentally type something formatted as Character & Dialogue instead of, for example, Technical Directions, as this will still be added to the list and appear as an option every time.
If this happens, and you’re like me and want to keep things neat, you might feel the need to prune your auto-correct list.
To do this in Scrivener 3, access the list can be via the Menubar, and Project/Project Settings. Simply select the entries you want to get rid of, click the minus button, then OK.