creo4 Drawing Setup option documentation for: DEF_BOM_BALLOONS_SNAP_LINES 
def_bom_balloons_snap_lines
Determines whether snap lines are created around the view when showing BOM balloons.
Default and Available Settings:
no*
yes
v>
1. The length of the arrowhead as specified by the crossec_arrow_length Detail option
|  The drawing_units Detail option determines the measurement unit for the crossec_arrow_length Detail
option. |