Solved/ Tabs in groups

Hi! prior to any configuration in the plugins i would like to better understand how to assign tabs .vs. groups . Currently I have tab "events", "gallery", "activity" whatever the group. I understood i can choose wich tab to be displayed or not depending of group thanks to activation toggle in CB GroupJive > Groups > Integration . Am I correct ?

Practically i need some groups to be fed through Activity ( no gallery available) and others with Gallery/Albums ( no possibility of posts in the group) - How do I?

Edit:
I tried to deactivate "Gallery" in some groups but still here in tabs (i cleared the Joomla cache)
I tried to deactivate "Activity" but it is still displayed (?)
(For activity, my aim is to hide the tab or above all to inhibate possibility to post an activity from the group, of course recent activity is triggered if group's user uplad a media in gallery)

Edit: Is it possible to hide the tab "Galeries" in a group if there was alrealdy some media uploaded 

Turning off tabs in groups only turns them off for the public and regular users IF they have no content. They do not function has explicit ON/OFF switches.

Practically i need some groups to be fed through Activity ( no gallery available) and others with Gallery/Albums ( no possibility of posts in the group) - How do I?

Turn them off, don't post any content into them, and don't let anyone else be owner/moderator/administrator of the group. Regular users shouldn't see the tabs anymore. CB Moderators will of course still see them.

OK I understand. I have an issue to hide the tab because there is some existing contents. Is there a clean way to remove the unforeseen content and enable the deactivation of tab ?

You'd have to delete that content from the tab or from whatever backend view is available for that content and it'll be hidden again. In a future release this behavior is planned to change, but right now I can't since it'd be a pretty substantial backwards compatibility break.

I also forgot if you're trying to control this on a category level then categories can turn off features permanently (except for CB Moderators). Simply edit the category then under Integrations tab you should see parameters similar to groups to turn features off. Maybe that'd be a better way to control things like you're wanting?

Yes, I created dedicated categories for different groups and the "switch" works at this level . This fix my issue