Summarize this article in one sentence.
Unfold the pattern and lay it out on a flat surface. Retrieve your instruction book and turn to the cutting layout guide for your pattern. Use the cutting diagram to help you identify the pieces you will need for your garment. The pattern pieces diagram may also be useful. Set your iron on low. Once the iron is preheated, iron the pattern. This will get rid of any wrinkle and folds in the paper. Carefully cut out each of the pieces at the correct size from the piece of pattern paper. Patterns contain various symbols. After cutting the pieces, familiarize yourself with the symbols printed on the pattern:  Single, heavy line: this is a cutting line. Double parallel lines: these lines are used to lengthen or shorten a garment. Triangles: triangular notches indicate where one piece will join with another piece. Dots: these empty or filled circles indicate where seams start and stop. Prior to cutting the pattern, you must properly prepare the fabric. Wash, dry, and iron the fabric. Fold your fabric as instructed in the pattern. Lay out your washed and ironed fabric on a flat surface—the wrong side of the fabric should face up unless specified otherwise. Always double check to make sure your fabric is machine washable. Flip the instructions open to the cutting diagram for your garment. Place and pin the pieces onto the fabric as described and shown in the cutting diagram. Before cutting, make sure your pieces are properly aligned with the grainline of the fabric. Retrieve a pair of sewing scissors. Carefully cut out the pattern. Rotate the fabric as needed.

Summary:
Locate the pattern pieces required for your garment. Iron the pattern and cut out the size you need. Identify the symbols on the pattern pieces. Prep your fabric. Arrange the pieces on your fabric. Cut the pattern.