Perhaps not the best way, but I got over this problem myself by setting IsEnabled="false" for the entire control, which is fine as I'm using the control as a viewer.
APArumuga Perumal S Syncfusion Team June 3, 2014 04:53 AM UTC
Thank you for your interest in Syncfusion products.
Yes, that is a radial menu which enables us to change character formatting,
cut/copy/paste selected contents, perform undo/redo operations and a lot more. We can
enable/disable it by setting “EnableRadialMenu” property as mentioned in the
online documentation which is available from Essential Studio v12.1 onwards.
Please let us know if you have any other questions.