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By default the control uses some styles from the theme css file. There are three options for styling the appearance of the control.
1. Add css classes to your theme css file.
2. Map the presentation mode of the Control - ListPageMaster or ListPageDetails external templates and use telerik:CssFileLink control to specify your css file.
3. Use css class propery of the NewsView control >> Advaced mode >> Appereance section.
I am sending you a sample css file with defined classes.
Let us know if there is anything else that we can do for you.
the Telerik team