RowIndex: Number;
The ColumnIndex property determines index of column that contains an icon selected from the image file implemented by the ImageListclass.
Use JSON or the setRowIndex method to set the property value. The following two parameters are specified on calling the setRowIndex method: value - index of the icon row, release - indication that the button is not clicked (optional).
The example of use is given in description of the Button.IsToggleButton property.
See also: