By default, users can resize the height of the column headers. You can disable this ability to set a fixed height or you can use the automatic sizing mode to fit the height to the header contents. Automatic sizing also disables user resizing.
This enumeration is used by the System.Windows.Forms.DataGridView control DataGridView.ColumnHeadersHeightSizeMode property and erload:System.Windows.Forms.DataGridView.AutoResizeColumnHeadersHeight method.
For more information about sizing modes, see Sizing Options in the Windows Forms DataGridView Control.