There are tabs in the game info that currently aren't active, but the only one that seems relevant for this is the "Player Reference" tab, and I don't think a single textbox is enough for this. (There'll also eventually be a "premises" tab with a sample opening scene, and a set of premade characters. Those will help, but aren't likely to be too useful for anyone creating a game from scratch.)

Right now, game info for anything complicated is usually shared on googledocs, and that's a big weakness in the game design. I really wish they'd open up the Player Resources tab for narrators to fill in; that'd overcome a lot of the "go here and read this 3000 word background doc" problems.

* starting information or narrative