# cellMargin

> When using a MultiColumnHeader this value adjusts the cell rects provided for all columns except the tree foldout column.

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor.IMGUI.Controls](/engine/6000.7/script-reference/unityeditor/imgui/controls.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
protected float cellMargin { get; set; }
```

### Remarks

This value is used for all cell margins except the column with the tree view foldouts since that column uses [TreeView\<TIdentifier>.baseIndent](/engine/6000.7/script-reference/unityeditor/imgui/controls/treeview1/baseindent.md) and assumes full width for rename overlay placement.

Additional Resources: [TreeView\<TIdentifier>.RowGUIArgs.GetCellRect](/engine/6000.7/script-reference/unityeditor/imgui/controls/treeview1/rowguiargs/getcellrect.md).