# Sandbox.UI.SplitContainer.OnTemplateSlot

```csharp
void OnTemplateSlot(INode element, string slotName, Panel panel)
```

You can create child panels in the template by setting attributes
on them, like slot="left" to make that panel appear in the left panel.

### Parameters

- `element` (`INode`)
- `slotName` (`string`)
- `panel` (`Panel`)

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