1. Fold and unfold the square in half making only a pinch mark at the edge. 2. Fold and unfold the edge to pinch mark making another pinch mark. 3. Fold and unfold along the diagonal making a pinch mark approximately where shown. 4. Fold and unfold along the shown line making a pinch mark only at the intersection. Google Android Design & Diagrams by Gerwin Sturm (2010-05-23) Page 1 / 6 http://www.