|With lines for about 25 pattern pieces, each in five sizes, all on one sheet, it is easy to become confused while tracing-off BWOF patterns. The mistake I make most often is to miss tracing some construction symbols like pleats or notches. To avoid these omissions, I use the diagrams of pattern pieces that are printed with the sewing instructions. All symbols are clearly indicated on these diagrams without the distraction of 99 other lines. I compare my tracing of each piece with the diagram before moving the tracing paper. If a symbol is missing, it is easy to find it and add it before it is too late.