---
title: "TouchBarItemPresence.optional(_:)"
framework: swiftui
role: symbol
role_heading: Case
path: "swiftui/touchbaritempresence/optional(_:)"
---

# TouchBarItemPresence.optional(_:)

The Touch Bar view isn’t visible by default, but appears in the customization palette.

## Declaration

```swift
case optional(String)
```

## Parameters

- `id`: A globally unique identifier for this item.

## See Also

### Getting presence options

- [TouchBarItemPresence.default(_:)](swiftui/touchbaritempresence/default(_:).md)
- [TouchBarItemPresence.required(_:)](swiftui/touchbaritempresence/required(_:).md)