Background Color

I’m new to Scrivener. How does one change the color background to black (like a blackboard) and the text white (like chalk). The idea is to approximate the appearance of a schoolroom blackboard.

Try the View ▸ Enter Composition Mode menu command—its default settings in fact are quite like what you describe. If you want to tweak them, go into the Appearance: Composition Mode preference pane, under “Colors”, and have at it.