You can draw and say the Reiki symbols aloud and with your hand in the air over the client, or silently and with your mind’s eye over the client. This can be useful when the energy is already flowing and your client is in a deep state of relaxation. Beginners should always practice with the voice and hand to really help memorize the symbol and the mantra that goes with it.
The following video shows you how to coordinate the drawing of the symbol and saying the mantra.
You can draw this at the beginning of every session over the crown or brow chakra. this is best when you are still learning Reiki, so that you get practice and learn to channel the energy of the symbol and know its general flavor and qualities. Once Reiki is second nature to you, you can switch to using it at any time during the session and actually draw it anywhere over the body that is holding the emotional and mental imbalance, blockage or injury.