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PDFTron includes a rich set of controls. They are used by the DocumentActivity and PdfViewCtrlTabHostFragment2 , and can also be used independently. To learn more about them, please see a detailed list of each component here .
Annotation and PDF interaction is implemented within the open-source tools package . This includes annotation creation & selection, text selection, form filling, link following, etc.
To change the way an annotation appears, see the Custom annotation appearance guide.
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