You need first to select a collection by clicking on the collection's dropdown like follows :
1. Change a collection's library
You should now see a collection's menu named Settings
), click that button to access the collection's settings view, where you will be able to edit properties.
You can change a collection's name ( 1
), which will also save its respecting category's name. You are also able to change the collection's library ( 2
). You can delete a collection by hitting the Delete button at the bottom of the screen. That will not delete the category.