I’ve been looking everywhere for this simple requirement: in the lower zone, I would like to open the Properties panel and the Mixer at the same time (one above the other). At the moment, if I open one, the other closes. Is there a way? Thanks for any help on this!
No, this is not currently possible.
You can assign a key command to scroll through the panels. You can even assign key commands for navigating directly to a particular panel.
This is done via Preferences > Key Commands
thanks Daniel!