Rosegarden - how to get a grand staff view in notation editor, i.e. treble clef on top of a bass cleff

Anywhere I looked on the web for the answer to this question, everyone always points to this rosegarden documentation, but it doesn't give a clear answer there so I'm going to give you one :)

This is what you're looking for:

To get this, you start in the main view (Track Editor) by making a treble clef segment (track) and a bass clef segment:

As you can see, I've labeled them "treble" and "bass" and they look like this, when opened separately in the Notation editor view:

To get the grand staff view (screenshot 1, above), go to the main view (Track Editor: screenshot number 2, above) and select both tracks/segments (Control+a) and hit the "n" key.