Adding instrument only to one flow

Hi, I’ve made a search but couln’t find answer.

When you have a work with several flows, is it possible to add an instrument only to a selected flow?
I’ve tried but it is added in the entire score.

Thanks.

In Setup mode Add a New Player.
Then right-click the new player, go to the Flows submenu and click Remove Player from All Flows.
Then go back to that same sub-menu and click the flow you want to add it do, or go to the Flows pane at the bottom and tick just the flow you want to add the new player to.

Thanks ! I won’t forget it.