See the answer to this question in a similar FAQ entry:
- How can I edit a role's permissions?
- Can I reassign a system role like NonAuthenticatedUser to a specified user?
- If I delete a custom role, what will happen to the users assigned to this role?
- If permissions conflict with each other, will GRANT or DENY have higher priority?
- How can I assign a custom role to a user in code based on some additional criteria?
- If I assign a role to a user, where can I see what permissions he has?
Can I assign more than one role to a user and how will permissions work in this case?
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