RadGridView offers a property that controls the height of the column headers. Please have a look whether the TableElement.TableHeaderHeight is set at run time. It is expected to affect the header row's height. It is also important to know whether the AutoSizeRows property is enabled/disabled.
As to the scaling, the grid control doesn't seem to be increased in size. Only the header row is enlarged. Are you running the application at DPI scaling higher than 100%? Is you application DPI-aware? Thank you in advance for your cooperation.
I am looking forward to your reply.
Dess | Tech Support Engineer, Sr.
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