The Chinese have known a lot of stuff about a lot of things for a lot of time. But I'm not sure that in this case a picture is worth much.
Laurie and Marie both commented on my newly-refinished Green Sweater with it's applied I-Cord. Marie asked if the sweater 'looked' any different and Laurie asked for pictures.
To answer Marie, the sweater looks much the same to me.
The I-Cord was applied until arriving at the location for a buttonhole, then worked unattached for the distance of the buttonhole, then re-applied until the next buttonhole. It creates a very unobtrusive little opening. Lovely, I think.