How Do I make a WebMontage user Read Only?

Open Access has a special role of "ROLE_READONLY" which is designed for this specific situation. It will mean that the user is unable to create their own Montages. However, you must add the permission of ALL to the role so that the users are allowed to observe data being published through the shared Montages of other uses. Therefore under this configuration the users will not be able to create their own Montage pages and can only view Montage pages made by other users (which as such cannot be edited either).