The CropBox is currently not supported by RadFixedPage class and is not preserved on an Import-Export scenario with PdfFormatProvider. CropBox is also not supported by PdfPageSource class and it is not preserved by using PdfStreamWriter as well. This property should be implemented in both scenarios.
At this point, the justify alignment is not supported. Provide the ability to export text with this setting.
Add support for Hidden and Empty Cells options:
With the current implementation, references like in the following expression cannot be evaluated and are treated as strings: =SUM('C:\Users\Your user name\Desktop\[Workbook_1.xlsx]Sheet1'!A1:B2)
Allow to password-protect a document, so that it cannot be shown (read) without the password.
To bring RadPDFProcessing to the next level you should support XMP metadata. This would extremely help to use pdf files from RadPDFProcessing in digital workflows. Reference: http://www.adobe.com/devnet/xmp.html
Currently, signature flags, represented by the 'SigFlags' optional entry, are not imported and exported, and there is no API for setting them.
As a result, documents signed with RadPdfProcessing (or with RadPdfViewer) appear in Adobe Reader without the blue document message bar at the top (the analogue of the RadPdfViewer's SignaturePanel).
If the API is supported, setting the flag to 1 or 3 would ensure that the message bar would be visualized in Adobe Reader.