# Editor.Asset.RebuildThumbnail

```csharp
void RebuildThumbnail(bool startBuild = True)
```

Delete existing cached thumbnail, optionally queuing for building a new one ASAP.

### Parameters

- `startBuild` (`bool`), default `True`: Queue building the new thumbnail ASAP, as opposed to waiting when it is actually needed and doing it then.

Declared in [Editor.Asset](/api/Editor.Asset).
Assembly: `Sandbox.Tools`.