In order to share the balance from one customer to another we will go to:
Clients --> Clients.
From here we will see the list of all our clients.
Click on the button 
to access the client tab.
We will go to "Billing and Collection" from the menu on the left and later to "Balance":
Click on the "Balance Transfer" button and the following window will open:
*The customer’s choice of registration and destination will be made by pressing the magnifying glass.
We see that in the "Destination Register" section the name of the person we have selected appears.
Enter the amount and click on the "Transfer" button.