Optimize the Telerik Reporting performance by parallelizing the reporting paging and rendering. Better utilize CPUs with multiple cores and as a result, improve the REST Service throughput and decrease the viewers' rendering times.

When using the Report Viewer under WinForms, Print Preview allows the user to scroll through all report documents.  I.E., everything in the document map.  However, when using the Wpf version you cannot.  In the Wpf version, the user must use the Document map to select and scroll through each particular area.

For large reports containing multiple documents, this is tedious.  

Please make the Print Preview functionality for the WPF control match that supported by the WinForms control.