Also known as parallel draft · alternate draft
A parallel version of the same document — explore an alternate ending or rebuild an act without overwriting the draft you may still need, then incorporate the winning pieces back.
Use a draft line when you need to live in an alternate version of the whole document -- a different ending, a page-one rebuild, a tone experiment that touches every act. Each line keeps its own save-point history, so the "safe" draft and the experiment stop fighting inside one overloaded file.
Name lines the way the room talks: "Alt ending -- she stays," not cryptic codes. Presence and comments attach to the structured draft you are viewing, which only helps if people can tell which parallel they opened. Retire or archive lines that lost so they stop competing for attention during the next break.
When a full-document experiment wins, incorporate brings the source draft line into the target as a whole-document source-wins operation in Phase 1. For scene- or act-scoped trials, prefer takes and promote instead of forking the entire script just to test a local joke or button.
A draft line is a full parallel document. A take is tighter -- usually a scene or act -- for trying a local alternate without branching the whole script.
Not if you name them like writers talk. Presence and comments stay on the structured draft you are actually viewing -- unclear names are what create wrong opens.
When you may still need the current whole draft intact. If the experiment could fail and you would want yesterday's full script back as a living parallel, fork a line.
Not yet. Phase 1 incorporate is whole-document source-wins. For selective scene experiments, use Takes and Promote; selective draft-line incorporate is roadmap.