Currently, importing a document with non-embedded TrueType font will result in a font instance with an empty font source. Support should be added for providing custom font data of TrueType fonts during document import.

Implement functionality for visualization of comment annotations.

Currently when the pdf document is loaded, no further changes can be made to it.  We should provide a way (automatically or explicitly through a method) to reload the page after the pdf content is modified.

Provide a way to create a custom layer in RadPdfViewer and allow to add custom objects on top of the pdf document (in a similar way as PdfViewer for WPF).

Allow programmatic navigation of the viewport of the PdfViewer.

Error message is: "One or more errors occurred. 
(Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfName' to type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfInt'.)"

The current implementation relies on valid cross-reference offsets in the PDF documents so that PDF objects are easily found and parsed. However, we may implement a mechanism for importing documents with invalid offsets for the objects inside the table.

Provide a way through UI and programmatically to load password-protected pdf documents in PdfViewer.

When RadPdfViewer is used in a master-detail page, I should maintain the previous page index when I traverse between pages.

Pdf document is not loaded when it contains Type1Font "middot" glyph.

Provide the option to integrate the hand signature using the digital signature of the PDF document

Images that have drop shadow effect are not properly rendered in PdfViewer - black background appears instead.

Implement import of documents containing Type 3 fonts.

The link annotations for the first page may not work if a document was previously shown in the PdfViewer.

The square annotation type displays a square on the page.

By specification, names are an atomic symbol uniquely defined by a sequence of characters. However, when importing a document with names defined as an empty sequence a handled InvalidCastException is thrown which leads to missing page content.

As an effect of this, characters, which are not contained in the StandardEncoding names, e.g. umlauts, are measured with incorrect glyph widths. This leads to incorrect glyph positioning in RadPdfViewer.

When in single-page-mode and navigating to a page with the same size as the current, the content is not updated unless some touch interaction occurs.

Provide support for Interactive Forms (AcroForms) in the PDF Viewer for Xamarin.

For detailed information on Interactive Forms concept check below: 
https://docs.telerik.com/devtools/document-processing/libraries/radpdfprocessing/model/interactive-forms/overview

For example, if you scroll down and then scroll up to the previous pages, they do not show any content.

The pdf content is not visualized properly on UWP and iOS when the file is loaded from a stream. 

Also if you try to load PDF twice on the same PDF Viewer, an exception is raised.