creo9 Drawing Setup option documentation for: SHOW_OFFSET_SECTION_SEAMS
show_offset_section_seams
Controls the display of the seam that exists between segments of an offset section. This option is not applicable to the Full(Unfold)
and Full(Aligned) views.
angled_only* - Seam is shown for segments at angles other than 90 degrees.
all - Seam is shown for all segments including perpendicular segments.
none - Seam is not shown for any segment.