After purchasing fabric, pattern, notions, and preparing the fabric (on grain and re-shrunk / washed), you are ready to do the pattern layout. A layout is a plan for the placement of pattern pieces on the fabric.There are various categories of layout marking like grainlines, place of fold brackets, notches etc.There are also various methods of cutting marking such as single size, multi size and cutting in a particular body size
Grainline: This heavy, solid line with arrows at both ends is usually in the center of the pattern, although it can appear anywhere within the pattern piece. Use it to ensure the pattern is positioned along the straight grain of the fabric, so that the garment or project hangs properly. Unless otherwise indicated, pin the pattern piece so the grainline is parallel to the fabric selvage.
Place on Fold Bracket: This solid line with arrows that point to the pattern piece edge, indicates that the piece should be positioned along the fabric fold. This usually applies to garments that do not have a center front or center back seam.
Notches: Diamond or trapezoidal shaped symbols along the seamline are used both in pattern layout and during construction. When you are laying out the pattern pieces to match a plaid, stripe or large design, position adjoining notches so that the fabric at the seamlines (not the cutting lines) will match when the seams are sewn.
Cutting Line (single size): The outer line of the pattern piece provides a guide for cutting the fabric. The line sometimes has an illustration of tiny scissors on it.
Cutting line (multi-size): Multi-size patterns have several sizes printed on the same tissue and are sold in one envelope. Sometimes the multiple cutting lines are all solid, in which case it helps to highlight your size before cutting, and sometimes each cutting line is a slightly different line configuration.
Cutting line within the body of the pattern: When the design has a shorter view, there is often a cutting line for the shorter length within the pattern.