A:AnswerSorry the shelfs are non adjustable. They are all set as single pieces, The CD's were moved to the middle of the shelf due to weight on the top and if not properly Fixed to the wall with anchors it will fall over and destroy your collection. Possibly hurting and animal or kid or human in the process.
However anchored these shells are Extremely nice you don't have to find a stud in the wall. as the anchor goes into drywall not the Stud.