creo1 Drawing Setup option documentation for: show_total_unfold_seam            

show_total_unfold_seam

show_total_unfold_seam

controls display of seams (the edges of the cutting plane) in total unfolded cross-sectional views.

default and available settings

yes*

displays the seams (the edges of the cutting plane).

no

blanks the seams (the edges of the cutting plane).