As Elite said, sets are not displayed if they are empty, you can tick the 'show empty sets' to have them displayed.
Alternatively you can check the items you want to add to a set and add them with the dropdown menu (you can find it right above your items)
Check the items and move them to the set, it should now be displayed right in your deactivated or activated.
You can also change the name with the 'edit' button.
It's a great way to keep things organized, have a look at my
deactivated or
activated
Last edited by Krong; Nov 15, 2017 at 01:04 PM.