Any user on your website will have a set of permissions, which dictates what areas they can (and can't) view.  

1. To alter these, first select a user as you would when editing

2. Select the Authorisations tab and you'll see the form shown below

3. You can now either to choose a User Type template, or select Custom from this list and choose from the tick-list.

4. When you have completed your selection, click Save Changes and the user's permissions will be updated.