A remark, not a question: in the manual it says
To move the playhead to the start of the earliest selected item, press Alt-P.
On my PC (Windows 10), Alt key is OS level, always the shortcut to the current app’s menu. So when I try to follow the quoted instruction in Dorico, all I get is the menu list, there being no menu item beginning with P.
Actually a bit frustrated with the transport. Be nice if its window docked somewhere, and would be nice if you could directly enter a measure number, or timestamp.
Another thing: transport panel to switch between or select a flow to play back.