Latch Hook Bouquet Pillow Free Pattern How to read charts: The design is shown in chart form. Each colored square on the chart represents one knot. The canvas, when looked at closely, has parallel horizontal threads and twisted vertical threads. In latch hooking the knots are made over the horizontal threads. Starting at either the top or bottom left, work across in rows from left to right. Complete one row at a time, using yarn colors corresponding with the graph.