Hi Wade,
Your issues can be solved by editing the default template of the control. As you already found a solution for the indent of the
Header I will tell you a solution for the border line. In your case (as I see in the picture) you want to set a linear gradient brush for background of the header which continues on the content of the selected Item. The gradient of the
Header can be set from the
Background property of the
Border element called
"SelectionVisual" in the default template of the
RadTabControl.
For your convenience I extracted the default template of the control in the attached project. Please take a look at it and let me know if it works for you.
Regards,
Pavel R. Pavlov
the Telerik team