How do I edit the background of the square that appears in the header when you group a column?

[Joshua]

How do I change the background of the square that appears when you group a column. See picture
http://i.imgur.com/E0QOA.png

I have Expression Blend and have been fiddling around with the template but not sure which part it is.

[Vanya Pavlova]

Hello Joshua,

 

This part is called GridViewGroupPanelItem/GridViewGroupPanelCell which represents a grouped cell.
You may alter its appearance either by creating a simple style or by editing its template, please refer to our online documentation for further info.


 

All the best,
Vanya Pavlova
the Telerik team

[Joshua]

PLease see the screenshot below for the part I am looking for (circled in red):
Screenshot

It is not the grouppanelcell but the little square that appears on the header row.

[Vanya Pavlova]

Hello Joshua,

 

This part is called GridViewHeaderIndentCell, which appears in GridViewHeaderRow when you group the data or when RadGridView has a hierarchical structure. You may alter its appearance either by creating a simple style or by editing its template. 

Best wishes,
Vanya Pavlova
the Telerik team