Hi Benny,
Thank you for using Syncfusion Products.
At present we do not provide support for
“Touch Scrolling and Zooming in PdfDocumentView for WPF Platform”.
We have created a new support incident to follow up the implementation of the feature. Please log in to your Syncfusion account from the below link to know more details about your query:
https://www.syncfusion.com/account/login?ReturnUrl=/support/directtrac/incidents
However we do support touch scrolling and zooming in PDF Viewer Control in WPF. You can disable the toolbar in PdfViewerControl and use it like a PdfDocumentView.
Please find the sample which illustrates disabling toolbar in PdfViewerControl and used like a PdfDocumentView in the below link
http://www.syncfusion.com/downloads/support/directtrac/150370/ze/PdfViewerSample422454523
Kindly let us know if you need any further assistance.
Regards,
Sathish Sivakumar