You mean seam edges?

script: /* Hide seam edges */ var breps = moi.geometryDatabase.getObjects().getBReps(); for ( var i = 0; i < breps.length; ++i ) breps.item(i).getSeamEdges().setProperty( 'hidden', true );

script: /* Show seam edges */ var breps = moi.geometryDatabase.getObjects().getBReps(); for ( var i = 0; i < breps.length; ++i ) breps.item(i).getSeamEdges().setProperty( 'hidden', false );