Navigation across projects is done using the project selector — the menu in the upper-left corner of the application pages. The menu displays the tree of projects the current user has access to.
Projects are grouped by project programs and by project portfolios. There are two built-in system portfolios:
Invite new users using the "Invite colleagues" link. Create new projects using the "Create project" link.
The last project viewed by the user is stored in the browser session, so opening the application opens the last viewed project.