Thank you for writing.
You can set the height of a hierarchical child row using the ChildRowExpanded
event. Here is an article on the topic: http://www.telerik.com/help/winforms/gridview-hirarchical-grid-resizing-child-gridviewinfo.html
. However, there is not a simple and straightforward way to make the scrollbars in the child template auto hidden.
I hope this helps. Let me know if you have further queries.
the Telerik team