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A bracketed arrow meaning the piece is cut double.
Also known as: Cut on fold, Fold line marking
A place-on-fold marking says the pattern edge must sit on a fold in the fabric, so the piece is cut as a symmetrical whole. Cutting it as drawn produces a garment half the width it should be, which is a mistake that cannot be undone.
Requires the marked edge to be placed on a fold in the fabric so that the piece is cut as a symmetrical double.
Contexts: Laundry
Produces a piece half the intended width if cut as drawn, which is an unrecoverable cutting error rather than a sewing one.
Contexts: Laundry
A line with an arrow turning through a right angle at each end, printed along one edge of a pattern piece.