---
title: tabbingIdentifier
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nswindow/tabbingidentifier-swift.property
---

# tabbingIdentifier

A value that allows a group of related windows.

## Declaration

```swift
var tabbingIdentifier: NSWindow.TabbingIdentifier { get set }
```

## Discussion

Discussion By default, a window generates a tabbing identifier from inherent window properties, such as the window class name, the delegate class name, the window controller class name, and some additional state. Group windows together by using the same tabbing identifier.

## See Also

### Managing Window Tabs

- [allowsAutomaticWindowTabbing](appkit/nswindow/allowsautomaticwindowtabbing.md)
- [userTabbingPreference](appkit/nswindow/usertabbingpreference-swift.type.property.md)
- [tab](appkit/nswindow/tab.md)
- [NSWindow.TabbingIdentifier](appkit/nswindow/tabbingidentifier-swift.typealias.md)
- [addTabbedWindow(_:ordered:)](appkit/nswindow/addtabbedwindow(_:ordered:).md)
- [tabbingMode](appkit/nswindow/tabbingmode-swift.property.md)
- [tabbedWindows](appkit/nswindow/tabbedwindows.md)
- [mergeAllWindows(_:)](appkit/nswindow/mergeallwindows(_:).md)
- [selectNextTab(_:)](appkit/nswindow/selectnexttab(_:).md)
- [selectPreviousTab(_:)](appkit/nswindow/selectprevioustab(_:).md)
- [moveTabToNewWindow(_:)](appkit/nswindow/movetabtonewwindow(_:).md)
- [toggleTabBar(_:)](appkit/nswindow/toggletabbar(_:).md)
- [toggleTabOverview(_:)](appkit/nswindow/toggletaboverview(_:).md)
- [tabGroup](appkit/nswindow/tabgroup.md)