To invite team members to your project click ‘invite members’ in the sidebar of your project screen. Enter an email address and an optional message in the first two boxes, then click the send invitation button or enter to confirm the invitation. The invitee will receive an email with your message and a link to your project.
You can also add them by sharing the public link with them, which is found under the email invitation boxes. You have to activate the link for your team members to join. Until accepted, the invitee will have ‘(pending)’ behind his/her name in the members list. Managing members is reserved for project leaders and owners.