If you want to change the style of the selected item, you can edit the template of Carouseltem. It has trigger responding to its selected state and you can change the corresponding properties and their values so that it fits into your requirements.
Let me know in case you need any further assistance.
On a side note, you can use your licensed account for writing in our forums as well. Do you have any problems using it when posting in a particular forum ?
the Telerik team
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