Maybe this can help someone, not sure if the binding set closure setting the value back to nil will work for all scenarios. struct ContentView: View { enum DetailScreen { case first } @State private var selectedDetails: DetailScreen? @State private var preferredColumn = NavigationSplitViewColumn.detail var body: some View { NavigationSplitView( preferredCompactColumn: .init( get: { selectedDetails != nil ? .detail : .sidebar }, set: { _ in selectedDetails = nil } ) ) { Button("First") { selectedDetails = .first } } detail: { switch selectedDetails { case .first: Text("First") case nil: Text("Select something") } } } }