To manage 'team members’ roles, your account must be designated as an admin for the team.
To invite someone as an admin or billing only member, head to your Team Dashboard and click 'Add Support Account' in the Settings drop-down menu. Enter the recipient's email address, choose what roles you want to assign, and hit Send. The invite you created will appear at the bottom of your team list.
If you have already added this member as a user to your team, you can visit your Team Dashboard, click on the Settings icon, and click “Manage Permissions”. You can then reassign roles by selecting/deselecting the associated labels next to the members of your team. Make sure to click the “Done” button in the yellow-highlighted bar afterward to save changes.
Please note: members of your team who are designated as "user"s will take up paid slots.