Okay, I do understand what "understitching" is when it comes to collars, but i'm making a dress and it claims to be "easy", but I'm totally not understanding what understitching means in this context. The dress has a lining, cut out of the same pattern piece as the dress. I'm now at the point where I'm supposed to sew the lining to the dress..."with right sides together, pin lining to dress, matching seams and having raw edges even. UNDERSTITCH lining". I do not understand, please help!!!
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