There are a lot of reiki symbols generated by different reiki schools. These symbols were created to enable reiki healer to access specific energy for specific purposes.
The most popular and also the most important are the three symbols: Cho-Ku-Rei, Sei-Hei-Ki and Hon-Sha-se-Sho-Nen
Here are more details explanation about te function of each symbols:
1. Cho-Ku-Rei
The main function of this symbol is to strengthen reiki energy or reiki healing program. This symbol is very good for your physical body, you can boost your daily energy with this symbol (for example when you feel exhausted and tired). Cho-kU-Rei can also be used to strengthen other reiki symbols or reiki healing programs (combination of symbols).
Other application of cho-ku-rei is to clean and activate your chakras. and also clean your physical body from negative energy.
2. Sei-Hei-Ki
This reiki symbol can easily sweep negative energy out. It can clean and balance your chakras and it is very effctive for your emotional 'body', therefore it will enable you or any recipient to balance their emotional state and live a better life.
3. Hon-Sha-se-Sho-Nen
This is the most complicated to draw among those three reiki symbols, but this is one of the most important symbol. This symbol has a lot of specific function relate to distance healing and also to work deeper on your chakras to reveal its core. This symbol is also very good for your mental 'body'.