(read carefully if you intend to modify your cabinet's shelf positions)
To move a storage shelf, first remove all bottles, then move the shelf brackets and make sure to fit them back into slots as shown below:
To move a sliding shelf, first remove all bottles, then remove the sliding tray by sliding it toward you while lifting the front part. Remove the sliding guides from the walls, while
making sure not to mix up the right and left guides. Then refit them as shown below: