--- title: Notches --- There are two types of notches. The default notch is a dot in a circle. An alternative style shows a cross in a circle. This style is used to indicate the back of a garment. For example, on a sleevecap you may see a dot and a cross notch. This way you know which side of the sleevecap is the back (the one with the cross notch). ##### Why we chose these notches In electromagnetism, a ⊙ symbol is used to indicate a flow of current coming towards you (to the front), whereas ⊗ is used for a current moving away from you (to the back). You can also think of an arrow. When an arrow flies towards you, you see its tip (⊙). When an arrow flies away from you, you see its fletches (⊗).