How can i hide all topics from Guests ?

How can i hide all topics from Guests.

only registered members can be see the topic.

please help..

i am using phpbb3
style is fisubice2.

go to ACP -> Tab (Forums) -> Forum Permissions -> (Choose the forum ) -> Choose "Guest" from Mange groups select list and Edit permissions and set the permissions you want . such things is not related to the style you are using .

i hope i helped .

thanks.