In the Items Module By clicking on an item with multiple quantities (1) the occurrences can be split into individual occurrences (2).
After the occurrences have been split.
By right clicking on an item with multiple quantities from In in Items List; the occurrences can be split into individual occurrences.
After the occurrences have been split.
Note that the items list must be unique. This feature is not available for Rooms with a template applied.