I've been able to implement an expand/collapse control for all the groups in my grid based on some of the posts I found in this forum. I'm using the client side api and I have a button that I can put either outside of the grid or as a command item in the header of the grid. This is working just fine, great actually. I am just wondering if there is any way that I can add this control to the header of the GridGroupSplitterColumn? I've attached an image and put a red X in the location I am referring to. I can use some jquery to sort of hack something I just wondered if there is any built in way to access this part of the grid. Thanks for any help.