For example, when some PDF file has uncompressed contents we may import it and apply better compression to the stream objects. Ensure that all the content inside the document is compressed.

Currently, we have the following options for PDF export optimizations:

• ImageQuality
  

  pdfFormatProvider.ExportSettings.ImageQuality = ImageQuality.Low;

• ImageCompression
  

  pdfFormatProvider.ExportSettings.ImageCompression = new ImageFilterTypes[] { ImageFilterTypes.FlateDecode };

• StreamCompression
  

  pdfFormatProvider.ExportSettings.StreamCompression = new StreamFilterTypes[] { StreamFilterTypes.FlateDecode };

• FontEmbeddingType (Q2 2024)
  

  pdfFormatProvider.ExportSettings.FontEmbeddingType = FontEmbeddingType.Subset;

  We introduced an option of exporting subsets of True Type Fonts (*.ttf) for the .NET Standard version of the library.

They are exported with the /EmbeddedFiles switch. This would allow adding external files to the PDF document.

Currently, this missing functionality may be workaround by either drawing the headers and footers with FixedContentEditor or by using RadWordsProcessing PDF export.

Currently, for .NET Framework scenarios, this could be achieved using RadPdfViewer's WPF control ThumbnailFactory class. Sample code may be seen at this forum post:
http://www.telerik.com/forums/pdf-thumbnail-returns-transparent-images#jO33X-E8Cki_qLh_KsToWg.
The feature should be implemented for .NET Standard as well.

Implement importing and exporting the javascript actions associated with push button fields so that they can be executed when the exported document is opened with Adobe Acrobat. Javascript actions are also used by text fields for text validation (for instance for date input).

Support for forms. The feature is named 'Interactive forms' in the PDF specification.

Main scenarios to consider:

- Reading of the data in the forms.

- Writing data to the forms.


Available in R2 2017 Release

Add support for documents containing RTL (right-to-left) text.

You can convert the document to PDF and use the approach bellow:

Currently, silent async printing may be achieved by using RadPdfViewer WPF control. Sample demo showing how to achieve this may be seen at the following forum post:
http://www.telerik.com/forums/pdfviewer-print-makes-ui-unresponsive#js0YdzFWc0Oa8C3g6a18lg

The RadPdfViewer WPF control used does not need to be displayed, making this demo a good workaround for ASP.NET AJAX clients.

Add support for a strikethrough property or strikethrough-related properties in the TextProperties class.

At this point, the justify alignment is not supported.
Note: When implementing this functionality, ensure that there an is appropriate public API for setting the text alignment to Justify

This would allow to encrypt documents only with Owner Password and not showing password dialog when disabling some PDF features permissions. The customer should be able to disable printing, text and graphic selection and extraction, page rotations and others. The full specification of all permission bits may be seen in Table 3.20 on page 124 in PdfReference 1.7. On page 120 in PdfReference 1.7 are described the User and Owner passwords.

This API should provide a method for removing all fields and widgets in the document and draw the default widget appearance in place of the removed widgets.

WORKAROUND: Sample implementation for flattening form fields may be seen in the FlattenFormFields method from the attached demo project.

Optical character recognition or optical character reader (OCR) is the electronic or mechanical conversion of images of typed, handwritten, or printed text into a machine-encoded text from a scanned document.

Implement functionality allowing to specify that when a table is split on multiple pages, a specific row should be shown on each page.

Workaround: in the attached demo projects.

According to PDF specification, all fonts should be embedded except from 14 Standard PDF fonts. This guarantees that the PDF file is self-contained and will be rendered successfully on different devices and operation systems.

However, some clients prefer not to embed fonts in order to reduce file size. That is why we may provide such API.

Currently, NotSupportedException is thrown when trying to import a document that uses Type 3 fonts.
Update: With Release R1 2021 the import of Type 3 fonts is already developed but the export is still not supported.

Implement functionality to support scenario when a document which already has a signature to be signed again or add two or more signatures.

This property should work similar to PreferredWidth cell property but in vertical direction.

PDF/A-1a is with conformance level A (for "accessibility"), and must adhere to all of the requirements of the PDF Reference as modified by the ISO 19005 specification. 

It requires structural and semantic properties to be preserved. Level 1a uses “Tagged PDF” and Unicode character maps to preserve the document's logical structure and content text stream in natural reading order. 

The following features are used:
- Language specification
- Hierarchical document structure
- Tagged text spans and descriptive text for images and symbols
- Character mappings to Unicode

The purpose is to improve accessibility and make the content accessible for screen readers.

The currently supported compliance levels can be found in the How to Comply with PDF/A Standard article.