This option is not supported at the moment.
Feel free to add a request for it into our feedback portal
and describe the exact functionality you expect from a PictureBox item.
This way other community members also interested in this functionality can vote for it which will raise its priority. New features are selected for development based on the interest from the community members.
Telerik by Progress
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items