[kristop]

Go to Settings->Touch & Pedal Settings->Touch Actions, then assign the "Next Annotation Layer" action to one of the corners. You can then tap that corner to switch layers, and this works while performance mode is active.

Mike

Ah ok, found it. Could be a solution, but not with how I use the layers : I have one layer with annotations I need when I play (such as fingering, nuances...), and additional layers that I use when I am practicing the piece only and not for performances (such as : harmony analysis, memory markers...). So I'd like to toggle between the 1st layer and all 3 layers !
(hmm there is a way : I can build a 4th layer by copying all 3 layers in this one! But its a bit ... have to redo it each time I modify a layer...)