# Sandbox.UI.SplitContainer.UpdateSplitFraction

```csharp
void UpdateSplitFraction(float f)
```

Sets the split fraction to this value. Will automatically adjust the value
according to MinimumFraction parameters, and will save the new value to cookie.

### Parameters

- `f` (`float`)

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