Inside the span and reversed, but written through to a backend that keeps its copy — so the reversal is canvas-only. What the footer warns about.
The simulated net effect of committing it.
The span, newest first — the rows the menu marks.
The same thing as something the canvas can wear: what would go, what would be
hidden, and where what is not on the canvas would come back. Hand it to
graph.showForecast.
The elements the span touches that are on the canvas now. An entry whose elements are gone names none, honestly — see forecast for those.
Inside the span, left alone because they are sealed.
What a span would do, before it is committed.