Hiding/Showing tacets
You can hide/show tacets in each layout independently, for example, if you want to show empty bars or multi-bar rests in some layouts to allow those players to add in notes on those staves later.
Procedure
Result
Tacets are shown in the selected layouts when Show tacet for flows where no players are assigned is activated and the player is not assigned to the flows in which they do not play.
When it is deactivated, any flows to which the player is not assigned do not appear in the layout. When the player is assigned to those flows, all bars in the flow are shown in the part, split into empty bars and multi-bar rests as appropriate for the flow.