default* - Uses the style defined by the arrow_style drawing option. The default arrow style of BOM balloon is defined by the def_bom_balloons_edge_att_sym and def_bom_balloons_surf_att_sym Detail options.

filled - Fills dots and boxes for arrows of linear dimensions. Use "filled" to have new drawings appear with dots and boxes filled for dimension arrows.

hollow - Dots and boxes for arrows of linear dimensions are not filled.