Open the project by selecting it in the projects list, click the share icon and type in your collaborator’s email.
You can also type in the name of a Team if you're on the Business or Enterprise plan. This way the email invitations will be sent to all collaborators that belong to that team.
Trial plan users have a 15 email invites restriction by default. If you need more invites contact us via the Intercom messaging icon on the bottom right corner of our webapp.
You must be either a project owner or be granted Power User access via the project owner to manage a project’s setting including sharing.