It is often necessary for accurate workmanship to draw or mark the outlines of the pattern object on the wood, at various stages of the work. This is done by tracing round the outline of the model, by copying a drawing, or by means of given measurements.

The following tools are necessary:for measuring off and subdividing measurements. A rule of hard wood, one metre or half a metre long, divided into centimetres and millemetres, is the best for the purpose. A thin folding rule of strong wood or ebonite may be used for less exact measurements, and is convenient to carry about, but is not altogether trustworthy, on account of the looseness of its construction, and the gaps at the joints.*