radgridcolumn chooser

        Font f = new Font("Arial", 12f, FontStyle.Italic);

        public RadForm1()
        {
            InitializeComponent();

            this.radGridView1.ColumnChooserItemElementCreating += radGridView1_ColumnChooserItemElementCreating;
            this.radGridView1.ColumnChooserCreated += radGridView1_ColumnChooserCreated;
        }

        private void radGridView1_ColumnChooserCreated(object sender, ColumnChooserCreatedEventArgs e)
        {
            e.ColumnChooser.Font = f;
        }
        
        private void radGridView1_ColumnChooserItemElementCreating(object sender, ColumnChooserItemElementCreatingEventArgs e)
        {
            e.ItemElement.Font = f;
        }