# Rewind()

> Rewind the Scratchpad; rewinds all ScratchpadAllocator invalidate all allocations made from it, and potentially also free memory blocks it has allocated from the system.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md)
* **Assembly:** UnityEngine.EntitiesModule

```csharp
public static void Rewind()
```