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title: Dynamsoft Document Viewer API Reference - Interface IQuadModifiedEvent
keywords: Documentation, Dynamsoft Document Viewer, API Reference, Interface IQuadModifiedEvent
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description: Dynamsoft Document Viewer Documentation API Reference Interface IQuadModifiedEvent Page
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# IQuadModifiedEvent

## Syntax

```typescript
interface IQuadModifiedEvent {
   oldQuad: Quad;
   newQuad: Quad;
}
```

See also [`Quad`](https://www.dynamsoft.com/document-viewer/docs/api/enumeration-type/quad.md)