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Official blog about PDF4QT software

  • Introduction to plug-ins

    PDF4QT Viewer Profi uses plug-ins to provide additional features to users. There are currently seven plug-ins, which the user can turn on/off in the Options dialog. They are turned off by default.

  • How to annotate/markup a PDF document

    PDF4QT ViewerProfi offers extensive annotation tools. You can annotate a PDF document with geometric shapes, sticky notes, stamps, text boxes and various forms of text highlighting. The tools are very easy to use, using your mouse to create annotations directly in the page of a PDF document. Go to the ‘Insert’ menu to start annotating your document. Annotator creates annotations...