A project is a self-contained piece of work which includes a collection of files and folders. Examples of projects include: a software application, a website or documentation. A project is self-contained in the sense that it contains all the files it needs. Different projects can share files using components. Each project will have at least one version.
To create a project right-click the Projects tree item and select 'New Project'. This will ask you to name the project.
To hide a project you can right-click and select 'Administration | Reject'. If a project is rejected then developers will not be able to submit changeset to any of the project versions. You can right-click the Projects tree item and select 'Show Inactive Items' to show rejected projects.