As an admin you can edit a category and there you can see, under Security, a list of all the groups who can access the category with their permissions.
However I cant find any way to do it the other way around - to get a list of all the categories which a group can access.
Is this possible, and if so where? If not shouldn’t it be? It would actually be quite useful info to display in the group box in the groups page, so that as a user I can see what I would loose if I was to leave a group. (or what I would gain if I was to join a group that was visible)