How do I tell the Score Editor what octave to centre the score on?

I want to print out a score from the Score Editor. I’m not trying to edit anything in the Score Editor - I do my editing in the Key Editor.

I want to represent these notes with a treble-clef score. (I have an even lower set of notes for the left hand I’m using the bass-clef for). How do I tell the Score Editor to center itself an octave lower so these notes are more centred on the ledger lines?

Thanks in advance,

Set the clef to Treble 8vb, after doubleclicking the clef symbol.