How to transfer money between Balances
Please go to the Balances page, click "View" on the tile of the Balance you want to move money to and then click "Internal transfer" at the top right of your page. You will be able to choose which Balances you are transferring to and from, and how much you would like to transfer.

If you have payments enabled on your account, you can go to the Payments page, and then click "Internal transfer" from there.
Roles
To make a transfer, you will need to have the role of Owner or Admin on your account, or a Balance Admin or Balance Payer on the Balance you are paying from.