Gutenberg - New Navigation Block

There's a new experiment flag that you can enable or opt into by going to Gutenberg experiments and checking the box. In the sidebar controls for your blocks where you would normally set your appearance settings, it's going to split out the appearance items from everything else. So there will be a new tabbed interface in that sidebar so that you can kind of minimize the amount of scrolling that you need to do. The navigation block also uses that space in the sidebar to actually have an off canvas editor. There is a global styles color randomizer.