# Sandbox.UI.Panel.TabIndex

```csharp
int TabIndex { get; set; }
```

Where this panel sits in the Tab order. 0, the default, is tree order. Positive values come
before that, lowest first. Negative means Tab skips it, though it can still be focused by
clicking or [Sandbox.UI.Panel.Focus](/api/Sandbox.UI.Panel/Focus).

Declared in [Sandbox.UI.Panel](/api/Sandbox.UI.Panel).
Assembly: `Sandbox.Engine`.