Question about a scarf I'm knitting

I’m in the middle of making a scarf. I don’t understand one of the instructions… here is the scarf I’m making
What does it mean when they say seam up the side using the grafting technique. I’m assuming I fold it in half and sew up the edges. Which technique would I use to do this? Any videos out there?

Yes, after running through the pattern instructions I believe you are supposed to fold it in half even though it is not stated.
Good luck,

It says grafting/invisible seam technique. The invisible seam is mattress stitch.

ok, thanks :slight_smile: