I am not sure that I fully understand your scenario. Do you want to scroll group D3 to the position of D4? Or maybe you want to make D3 current (highlighted in yellow), instead of D4?
May be you need custom grouping? If so, you can create custom groups in RadGridView
by using the CustomGrouping
event. Consider the GridView >> Grouping >> Custom Grouping
example in our demo application which demonstrates its usage. Find further details in our online documentation
the Telerik team