A short lesson from the Master Weaver series on how to work out a treadling when a draft gives only the threading and tie-up. It explains the basic treadling that produces a square, symmetrical pattern by drawing a 45-degree diagonal under the threading and reading off which treadle makes each square. Three figures work through a 1:3 diamond twill and two further drafts where each treadle is tied to two frames. The lesson also explains the origin and extended meaning of the term "woven as drawn in".