In pattern drafting a tracing paper is used to: Copy or duplicate patterns accurately from an original draft Transfer markings such as darts, notches, grainlines, seam lines, and style lines Modify or develop patterns (e.g., adding style changes, adjustments, or design variations) Preserve the original pattern while experimenting or correcting on a separate sheet Create layered patterns for different sizes or style options In short, tracing paper helps designers work neatly, accurately, and flex