WHAT CLIPS CAN I FIND IN THE FORMULA TAB?
The tab Formula is only available for mainusers and subusers. Here you can find all the clips that have been shared with you from other users in the Formula. You cannot edit clips from this tab, but you can add them to a playlist. If you want to be able to edit them, you can duplicate them and they will become available in your Own tab. You will then be the owner of that copy and can do whatever you want with it.

HOW CAN I DUPLICATE CLIPS?
You can duplicate a clip to your Own tab, by clicking on the icon to the right of the clip and selecting [duplicate]. The clip will then be duplicated to your Own tab with the same name. However, if you don’t have the template of the created clip available on your new clip page, you are not able to duplicate the clip.