The Manage Permissions dialog includes System Permission and Website Permission tabs. The options available to you may vary based on the user's role and the resource being managed.
System Permission
Use system permissions to control the actions that a system user can perform on the website. The available permissions include options such as View, Edit, Delete, Publish, and Review.
The System Permission model is role-based. Administrators have broad access to resources, while Authors can manage their own content and Contributors can access only the resources and actions explicitly assigned to them.
Website Permission
Use website permissions to control who can access an individual file or folder.
You can either:
Inherit from parent: Use the permission settings of the parent folder.
Restricted to roles: Allow access only to users with the selected roles.
Assign or modify the system permissions for users who work on your website.
Control who can access a file or folder by using the permission settings of the resource or its parent folder.
Inherit from parent to use the permission settings of the parent folder.
Restricted to roles to restrict access to selected roles. This option is available only after roles have been created under Website Permission > Portal > Portal Roles and users have been assigned to those roles under Portal Members.