This topic is related to the “How to improve image quality in GroupDocs.Annotation” that I opened some days ago. I followed this suggestion to increase the quality of GropDocs.Viewer but it just works for HtmlViewOptions it doesn’t work for PngViewOptions.
Git Repository: https://github.com/groupdocs-viewer/GroupDocs.Viewer-for-Java.git
Git Branch: master
Git Revision: f75a0b71811fcb93ecdb8f6730cbf3a3f9231abc