Maybe this will help with some special scarves I want to make for Christmas this year . . .

Knit A Heart - Free Knitting Patterns

Surface darning - nice illstration. I might switch to a blunt tapestry needle for the back-and-forth weaving, after laying down the weft with a pointed needle. "Wear Your Heart on Your Sleeve" (2014)

Note using different color for perpendicular threads as design detail, not just to clarify the steps for illustration.

Embroidery Stitches Galore + Imaginative Applications  /  ECI

Different types hand embroidery stitches