To rename your project, simply click the project name at the top of the project view, select "Rename project," and enter the new name inline.
You can also access the project preferences from the sidebar by hovering over the project you wish to edit and clicking the small chevron icon that appears next to it.
If you need to change privacy settings, like who can access the project, click "Shared" or "[number] people" beside the project name.
Here you can both add and remove workspace members. To remove a user, just click the red "Remove" link next to their name.
To add new members to the project, simply type their names in the "Invite someone" field and hit
Enter to save.