Thank you for the attached picture.
I am afraid that there is no alternative to modifiying the styles when it comes to the customization that you are going for. That said, you can take a look at all of the available themes in the Theming
RadDocking example from our demos
. You might find a theme that suits your requirements without the need for customization.
If that is not the case, you can take a look at the Styles and Templates
section of the RadDocking documentation in order to learn how you can style the different parts of the control. If you encounter any difficulties, do not hesitate to reach out and I will be glad to assist you.
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