On the left-side Navigation Panel, click Settings.
On the Settings page, under Reports click Revenue Center.
On the Revenue Center page, click + New Revenue Center to create a new one, click the Pencil Icon to update an existing one or click the Trash Can to delete it.
On the New (or Update) Revenue Center pane:
Enter the Name of the Revenue Center.
Select all the Nodes attached to the Center on the dropdown.
When complete, click Save (or Update) at the bottom-right of the pane.
If a Revenue Center was created, it will appear as a new row in the table, with the entered Name and selected Nodes.