Board Thread:General Discussion/@comment-33168089-20170821015513/@comment-126761-20170822135123

Not including a source mode is intended at this point of testing: GUI-driven document creation apps like Word do not provide a source mode - nor do they need one - and we want to see whether this editor can reproduce a similar kind of experience.

If there was a source mode, it would make validating the GUI-first approach much, much harder. Still, it's a topic we're always thinking about as the experiment matures and we add more features.