How to Edit a List's Properties
Sign in or go to the 'Organization and Projects' page.
Click the menu button on the list whose properties you want to edit.
Select 'Doc Properties' from the drop down menu.
You will see the Document properties dialog.
To find out more about altering permissions and columns click the round help buttons, marked with question mark, on the properties dialog itself.
To find out more about columns go to the section on list columns.