Hello Anvar,
Thank you for writing.
Currently, we do not support multiple monitors functionality in RadDock. Please follow
this link where you can add your vote and subscribe to the status updates of this feature request. If more people request the same feature, we will consider its implementation in one of the next major releases.
Should you have any other questions or suggestions, do not hesitate to contact us.
Greetings,
Julian Benkov
the Telerik team