Sending money to other payzy users can be done very easily through the main button on the homepage. Alternatively you can do it through the chat with a user by clicking on the corresponding money icon. You can then enter the exact amount to send as well as choose whether to continue using your wallet balance or to proceed with one of your saved cards.
Alternatively, you can transfer money to another payzy user through the "Transfer" section located in your wallet, where you will be asked to fill in the IBAN and full name of the user you want to send money to.