You can use the override feature to adjust the Team Split or the Fees the Team Leader pays on the behalf of specific members of your Team.
ProTeams are setup with default settings (the average / most common setup for all members of your Team). You can choose to keep everyone on the default setup, or override and adjust the default for a specific person.
When editing a Team Member, just toggle Override to Yes. If Override is toggled to No, the Team Split and other items will be greyed out and you will not be able to edit them.