Position of chord symbols on grand staff instruments in parts

Does anyone know how to apply the “Position of chord symbols on grand staff instruments” option to the piano part in Dorico 5 Pro? It seems to only change the position in the score, but in the piano part, the chord symbols still appear above the top staff.

Please help.

Thank you!

Layout options apply to the layouts you have chosen on the right of the dialogue. You must select the piano part layout in order to set its options.