Once you’ve set up a project, you can add co-owners to the project in the Basic Info tab of the Project Settings page. Co-owners have full control of the project, including the ability to add or remove content from the project, unpublish it, or delete it. The project will show up in the portfolios of all of the co-owners.
To add co-owners, click on the Add link in the Co-Owners section and add the names of the people who worked on the project with you.
You can add multiple co-owners and click Done to save and they will each receive an invitation to co-own your project.