How do I recover the AutoFitToView property after I have done a drag-drop or mousewheel operation?

Mar 9 at 2:20 PM
Edited Mar 10 at 1:38 AM
As is known to all, DynamicDataDisplay component has a great feature AutoFitToView which makes your chart move left automatically and adjust the horizontal and vertical axis to your custom data. But after I have done a drag and drop or mousewheel operation, this feature seems disappeared. The whole plotter area freezes. How do I retrieve the AutoFitToView property in this situation?
Thanks a lot for all your kindly helps.