creo4 Drawing Setup option documentation for: max_balloon_radius 
draw_arrow_style
Sets the style of arrows.
id="ww3_3_7_5_7_3_126_3" class="Body">Default and Available Settings:
0.000000* - Balloon radius depends only on text size. You can type a value for
the maximum allowable balloon radius.
|  The drawing_units Detail option determines the unit of measurement for the max_balloon_radius Detail
option. |