Thank you for contacting us and for the detailed description of your issue.
RadImageEditor's AllowMouseWheelScaling property indicates whether wheel scaling is allowed. If it set to true, you will be able to scale by the mouse wheel while 'Ctrl' key is pressed. Otherwise this operation will not be allowed.
Now, about your feature request - in the current implementation of the RadImageEditor you cannot scale to the mouse pointer, but I've logged that in our feedback portal, so you can vote for it and track its status there - Zoom to mouse pointer
If you have further questions, please do not hesitate to contact us again.
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