You can edit relationships easily in the Card View
You can add/remove relationships between selected items and other layers easily in the Card View.
Step 1. Unlock the lock icon by simply clicking on it (this enables you to edit the items/boxes).
Step 2. Double click on an item to bring up the edit menu..
Step 3. Click on the Relationship icon to see the Relationship tab
Here you can add/remove relationships between the selected item and other layer items easily and it will be updated on the current card view in real time.