Account and Opportunity Team Related List Customization Is Supported
Where: This change applies to Lightning Experience and the new Salesforce mobile app in Enterprise, Performance, Unlimited, and Developer editions.
How: Enable account or opportunity teams by selecting the option to add the related list to the page layout. Then, in the Object Manager, find Account or Opportunity. In the page layout editor, find the Account Team or Opportunity Team related list. To customize the layout, select and change the fields, sorting, and buttons as desired.