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To specify the output image size, call the setWidth() and setHeight() methods of the JpgViewOptions or PngViewOptions classes. Specify the value in pixels.

Note
GroupDocs.Viewer applies the aspect ratio automatically applied when you set the setWidth() or setHeight() value.

The following code snippet shows how to set the image width or height.

Java

import com.groupdocs.viewer.Viewer;
import com.groupdocs.viewer.options.JpgViewOptions;
// ...

try (Viewer viewer = new Viewer("sample.docx")) {
    JpgViewOptions viewOptions = new JpgViewOptions();
    // Specify width and height.
    viewOptions.setWidth(600);
    viewOptions.setHeight(800);

    viewer.view(viewOptions);
}

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