You asked: How do you rejoin yarn and pick up stitches?

What does pick up stitches mean in knitting?

In knitting, picking up stitches means adding stitches to the knitting needle that were previously bound off or belong to the selvage. Picking up stitches is commonly done in knitting garments, e.g. in knitting the collar or sleeves, and is essential for entrelac knitting.

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