## ThumbnailGeneratingOptions class


Can be used to specify additional options when generating thumbnail for a document.

```cpp
class ThumbnailGeneratingOptions : public System::Object
```

## Methods

| Method | Description |
| --- | --- |
| [get_GenerateFromFirstPage](./get_generatefromfirstpage/)() const | Specifies whether to generate thumbnail from first page of the document or first image. |
| [get_ThumbnailSize](./get_thumbnailsize/)() const | Size of generated thumbnail in pixels. Default is 600x900. |
| [GetType](./gettype/)() const override |  |
| [Is](./is/)(const System::TypeInfo\&) const override |  |
| [set_GenerateFromFirstPage](./set_generatefromfirstpage/)(bool) | Setter for [Aspose::Words::Rendering::ThumbnailGeneratingOptions::get_GenerateFromFirstPage](./get_generatefromfirstpage/). |
| [set_ThumbnailSize](./set_thumbnailsize/)(System::Drawing::Size) | Setter for [Aspose::Words::Rendering::ThumbnailGeneratingOptions::get_ThumbnailSize](./get_thumbnailsize/). |
| [ThumbnailGeneratingOptions](./thumbnailgeneratingoptions/)() |  |
| static [Type](./type/)() |  |

## Examples



Shows how to update a document's thumbnail. 
```cpp
auto doc = System::MakeObject<Aspose::Words::Document>();
auto builder = System::MakeObject<Aspose::Words::DocumentBuilder>(doc);

builder->Writeln(u"Hello world!");
builder->InsertImage(get_ImageDir() + u"Logo.jpg");

// There are two ways of setting a thumbnail image when saving a document to .epub.
// 1 -  Use the document's first page:
doc->UpdateThumbnail();
doc->Save(get_ArtifactsDir() + u"Document.UpdateThumbnail.FirstPage.epub");

// 2 -  Use the first image found in the document:
auto options = System::MakeObject<Aspose::Words::Rendering::ThumbnailGeneratingOptions>();
options->set_ThumbnailSize(System::Drawing::Size(400, 400));
options->set_GenerateFromFirstPage(false);

doc->UpdateThumbnail(options);
doc->Save(get_ArtifactsDir() + u"Document.UpdateThumbnail.FirstImage.epub");
```

## See Also

* Namespace [Aspose::Words::Rendering](../)
* Library [Aspose.Words for C++](../../)