Simultaneous viewing of dynamic and CC lanes

In the 5 Reasons to use Dorico video, it shows how to open both the dynamic and CC1 lanes at the same time. In Dorico 4.1 I can’t figure out how to do this. Is is possible? I sure would be REALLY convenient to be able to do this!

Screenshot from video.

As mentioned numerous times by Daniel Spreadbury himself lately, the dev team is in the process of rewriting the whole Play mode, and all the features present in 3.5 are not there yet (4.1), especially what you’re asking for here, but next significant update should bring it back (4.2?)