It is not possible to do this directly in the grid. The only alternative I can think of is to provide a TextBox with the width the user wants to set the RowSelectorPane to, and set it at the click of a button, or something of the kind.
private void button1_Click( object sender, EventArgs e )
gridControl1.RowSelectorPane.Width = int.Parse( textBox.Text );
Imported from legacy forums. Posted by André (had 867 views)