What type of diagram is included in sewing instructions to show how to place the pattern pieces on fabric?

The correct answer is Layout. In sewing instructions, a layout diagram is essential as it illustrates how to position the pattern pieces on the fabric. This diagram helps ensure that the pieces are arranged in the most efficient manner to minimize fabric waste and to align the pattern correctly, particularly regarding grainlines and any directional prints. By following the layout provided, sewers can achieve accurate cutting, which is crucial for the overall fit and appearance of the finished garment.

The other options, while they may sound relevant, do not specifically represent the function of showing pattern placement on fabric. A pattern map generally indicates the shapes and sizes of pattern pieces but does not focus on the arrangement for cutting. A design chart might detail design elements but would not provide practical cutting information. Similarly, a fabric guide may offer tips on fabric types and care but does not visualize layout instructions. Hence, the layout diagram is the most accurate answer for this purpose.