I've searched the archives but cannot find the answer to the following simple question concerning the magento backend. When I go to System -> Permissions -> Users -> Add New User -> User Role I understand I can assign zero roles or one role to each user. With zero roles assigned the user will not be able to log in. Once I assign the role (creating the role if needed), the user can log in and perform operations corresponding to that role via a restricted user interface. So far so good.
Here is what I don't understand: what does the Assigned: { Any, Yes, No } drop-down box. I've left it to the default (Any) just above the roles column, where the selected role can be found.
What is the meaning of the Assigned drop-down box on this screen?
Thanks.