Could you please, share with us some more detailed information of the desired by you appearance of RadPane's Header? Sharing an image with us will be of great help in order to provide you with the best approach to achieve the desired.
Attached you could also find a sample that demonstrates the described in the article approach. Please, check it and let us know if that is the appearance you are looking for.
Hope this helps.
Regards,
Nasko
Telerik
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