---
title: outlineTableColumn
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nsoutlineview/outlinetablecolumn
---

# outlineTableColumn

The table column in which hierarchical data is displayed.

## Declaration

```swift
unowned(unsafe) var outlineTableColumn: NSTableColumn? { get set }
```

## Discussion

Discussion Each level of hierarchical data is indented by the amount specified by the indentationPerLevel property (the default is 16.0), and decorated with the indentation marker (disclosure triangle) on rows that are expandable. Outline table column data is archived with the rest of the outline view’s state information. Attempts to set the value of this property to nil are silently ignored.

## See Also

### Working with the Outline Column

- [autoresizesOutlineColumn](appkit/nsoutlineview/autoresizesoutlinecolumn.md)