I have a RadCartesianChart with several line series, ShowTrackInfo is true, and I have a custom header set up exactly like is done here: http://docs.telerik.com/devtools/wpf/controls/radchartview/features/behaviors/trackball#trackinfoupdated .
It works great but I don't want to show the "Value: xxx Category: yyy" text fields any more. I just want to display my header in the trackinfo tooltip. How can I do this?