Two windows one on top of the other

Dorico
#1

In this video
https://www.youtube.com/watch?v=5uwZuEqbrLA
you can see a doubled window with the playback window on top of the write window. How to achieve this?

#2

Two windows viewing the same project?

twoWindows.png
twoWindows.png700×459 83.2 KB

#3

Thank you, now I have managed it to get the windows where I wanted them to be.