How to improve image quality in GroupDocs.Annotation

I made a test using the web sample application and another using the Demo Annotation Application. I load the same PDF in both applications and I saw that it was rendered pretty clear in the web sample application but when I did the test with the demo application it was blurry. So, how can I improve the image quality in GroupDocs.Annotation? Some time ago I received this sugestion for GroupDocs.Viewer, but I couldn’t find something similar in GroupDocs.Annotation.

Git Repository: GitHub - groupdocs-annotation/GroupDocs.Annotation-for-Java: GroupDocs.Annotation for Java examples, plugins, and showcase
Git Branch: master
Git Revision: d0cf869d9914888a17e204bbc8fec9a95337be15

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