To invite a new team member, edit what permissions a current team member has or remove a team member from your team you need to have Admin access to your team.
Adding a new team member
To invite a new team member to your team:
From the Dashboard, click on Invite a team member
Be sure to choose which role permissions you want the new team member to have in the dropdown:
Click Invite to email an invitation to the new team member.
Under the Invitations section you can see any active invitations that have not been completed yet.
Remove a team member
To remove a team member from your team, find them in the Team members list under Account > Team and click the Delete button next to their name:
If you delete a team member from your team and they where the last user with "full access" for a project, the project access settings will be reset so the whole team has "full access".