# Sandbox.MovieMaker.MovieUpdateBuilder.AddDefault

```csharp
void AddDefault(ITrackProperty property)
```

Adds writing the default value of `property` to this update.
This will only happen if no other tracks write to this property.

### Parameters

- `property` (`ITrackProperty`)

Declared in [Sandbox.MovieMaker.MovieUpdateBuilder](/api/Sandbox.MovieMaker.MovieUpdateBuilder).
Assembly: `Sandbox.Engine`.