Repro:
Take a song. I use Skies.sty Slow 12-8 RnbBlues.

Select a part in the mixer. I am selecting organ.

The Notation display displays a crowded unreadable gaggle of notes all above top C of treble Clef.

I want to be able to read them an octaved down - so as it is easier to identify notes (without counting ledger lines)

Go to the box with no label (why no label?) in the Notation window - the one LHS next to the black box with green letters - which should say "Organ".
Click on the box and change it from 0, to -12. This should bring the up the "Visiul Notation display".
type in -12
This should bring the visual display down an octave.

Nothing happens to the display - the track is not frozen.

?

Z

Win 11 64, Asus Rog Strix z390 mobo, 64 gig RAM, 8700k