To rename your list, simply click the list name at the top of the list view, select "Rename List," and enter the new name inline.
You can also access the list preferences from the sidebar by hovering over the list 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 list, click "Shared" or "[number] people" beside the list 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 list, simply type their names in the "Invite someone" field and hit
Enter to save.