In macramé, you'll work with two types of cords: the working cord and the filler cord Don't worry; it's very easy to determine their differences and to identify how they operate. The instructions for macramé knots below will give you a better idea of how they work. - Working cord: Cords that you actively manipulate to create the knots. - Anchor cords or Filler cords: Remain stationary and serve as the core around which the knots are wrapped around.