Table cells normally expand to enclose their content. Please set TableLayout="Fixed"
to the MasterTableView to prevent this expansion.
After this, depending on the RadGrid version, the header content will either overflow over the next column (older RadGrid versions) or it will be clipped (newer RadGrid versions).
If you are using some of the latest versions and still want the content to overflow, then use the following CSS rule:
overflow : visible !important ;
If you are using some of the older versions and want the content to be clipped, then use the following CSS rule:
overflow : hidden !important ;
By the way, it will be better and more convenient if you post your forum threads in the correct forum sections. Thank you.
the Telerik team