Chord symbols > Above top staff ... select staff how?

Chord symbols now appear above the top staff. According to help, I am supposed to enter Setup mode and select the player (staff) where the chord will appear.

I don’t understand how to proceed after entering Setup mode.

Try right-clicking the player you want to give the chords… (Left panel in Setup mode) There’s something like Show chords for all instruments (that player is holding).
Hope it helps!