I was trying to find a way to toggle between Page View and Galley View using a key command. I went to Key Commands in Dorico’s preferences and looked for it under View, because they’re under that menu item. Strangely, they’re not there, and a search revealed that in Key Commands they’re buried under Window/SwitchLayoutAspectType. This isn’t a big deal at all, but it might be more logical to put them under View in Key Commands.
Ctrl+Alt+1 is page view, and Ctrl+Alt+2 is galley view. There’s a bug that unfortunately prevents menu items that can show checkmarks from showing their key commands. We will try to fix that as soon as possible.