Depending on your site settings, you can set security permissions when you add new folders, documents, or objects; when you publish a document; when you check in a document; or when you view the information page for an object. You can also assign a security policy to set security based on document state. To change the security on an object, you must have the appropriate access rights.
To review the permissions on an object
Navigate to the Security Settings. This location might be accessed from a step in a wizard or from a security option of an information page. Review the existing list of users and groups and modify settings as needed.
To set security permissions: