# Features

**PdfStreamWriter** supports the majority of the PDF format features and preserves them in the resulting document.

Because the current **PdfStreamWriter** API provides methods for merging separate **pages**, the page content and the related page properties are preserved unmodified. However, PDF document properties are not imported and are not preserved in the generated PDF file. Such properties include:

* Document Outlines (Bookmarks)
* Interactive form fields
* Article threads
* Named destinations
* Document metadata

Destinations that lead to other pages are not preserved in the current version, except when they lead to the same page or to a previously merged page.

## See Also

* [PdfStreamWriter Overview](https://www.telerik.com/document-processing-libraries/documentation/libraries/radpdfprocessing/formats-and-conversion/pdf/pdfstreamwriter/overview)