Admin privilege as well as all others may be granted on the application or page level. Users with admin privilege on the page level have full access to this page, always bypass the record-level security and can grant privileges on the page to other users. Note, user can grant the privileges on only those pages he has admin privilege. Users with admin privilege on the application level have full access to any page and can grant privileges on any page in the application. Furthermore, they can manage all users (add, rename, delete users and change user's password) in the application.

All these operations are available via Administration panel.

User page_admin have admin privilege on this page on the page level and user admin have admin privilege on this page on the application level.

Login as admin or page_admin click by user name in the upper right corner of the window and Admin panel item will be available in an opened dropdown list. Click it to go to Administration panel to test it.