This is once again about that Lunch Card app. There's a section in my app's settings that controls the appearance - color scheme, if you will - of the whole app. The three options are System Default Light Dark The picker is set up, and it works as normal, but what would I specify the action of these buttons to be to force a certain color scheme, whether that be dark, light, or auto. Here's the code for where the picker is: struct SettingsView: View { @State private var selectedAppearance = 1 var body: some View { // ... Picker(selection: $selectedAppearance, label: Text(Appearance)) { Button(action: { // Change app color scheme to be auto }) { Text(System Default) }.tag(1) Button(action: { // Change app color scheme to be light }) { Text(Light) }.tag(2) Button(action: { // Change app color scheme to be dark }) { Text(Dark) }.tag(3) } // ... }