another method is:
Control Panel » Group Management
select each group one at a time and then edit forum permissions
Set the html field for 0 for undesired groups.
go back and repeat for the next group.
They both do the same thing.
But one method may be quicker than the other.
Depends on how many groups and forums you have.
Or if all of your forums have the same permissions.
Change one and use the mass copy to change all of them at once.
