ElementPlacement: MapLegendElementPlacement;
The ElementPlacement property determines the method of legend elements layout.
When selecting the type of legend elements layout into several columns, use the IMapLegend.ColumnCount property to set the number of columns. When selecting the type of legend elements layout into several rows, use the IMapLegend.RowCount property to set the number of rows.
The property use is given in the example for IMapLegend.MarkerSize.
See also: