I've used the OneTopic (una tema a la vez) format for a while, but in Moodle 2.1 there is a wonderful section called "Orphaned Activites" which I use to hide activities, but leave them accessible through links in other activities. Can anyone illuminate how I can access the "Orphaned Activities" section while in the tabs format?
Could you clarify whether you have actually created 'Orphaned Activities' section and having problem accessing it in the tabs format? A screenshot illustrating your post may help.