thank you very much for your reply. OK - RadDiagram does not provide visible scrolling.
Another related question:
If the web page, which includes the RadDiagram (amongst other controls), has the vertical scroll bars, then there should be a possibility to scroll this web page with the mouse wheel. However, scrolling with the mouse wheel will not work if the mouse pointer is over the RadDiagram. Scrolling the web page with the mouse wheel works over all other controls, but as soon as the mouse pointer reaches the RadDiagram, the scroll bar must be moved with the left mouse button to scroll down or up.
Is there a workaround to enable scrolling of the web page with the mouse wheel over the RadDiagram (perhaps using transparent control overlay or something similar)?