default* - Uses the style established in the draw_arrow_style drawing option. BOM balloon arrows are controlled by the def_bom_balloon_leader_sym Detail option, which defines the default arrow (attach point) style for BOM balloons in reports.

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.