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# subscript(sidebarVisibility:)

The visibility of the tab identified by its customization identifier.

```
subscript(sidebarVisibility id: String) -> Visibility { get set }
```

## Overview

Visibility can be set imperatively by subscripting with the tab’s id:

```
customization[sidebarVisibility: "com.myApp.alerts"] = .hidden
```

You can change the default visibility by using the
[`defaultVisibility(_:for:)`](/documentation/SwiftUI/TabContent/defaultVisibility(_:for:)) with a
[`sidebar`](/documentation/SwiftUI/AdaptableTabBarPlacement/sidebar) placement.

```
Tab("Alerts", systemImage: "bell", value: .alerts) {
    AlertsView()
}
.customizationID("com.myApp.alerts")
.defaultVisibility(.hidden, for: .sidebar)
```

If the ID isn’t associated with a tab or the tab has not been customized,
a default value of `.automatic` is returned.

---

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