The internal space of any cabinet/wardrobe where there are partitions or shelves added, will be divided into two or more subsections. The overall internal space, as well as its larger sections that contain partitions/shelves are called Parent Partitions. The smallest subsection, containing no partitions/shelves inside, is called a Child Partition.

The Partition ID is the name assigned to each section of a cabinet/wardrobe, in the form of a tab on the right side of the properties panel when you click inside that section. For example, the Partition ID of the smallest section will be called 'Partition', whereas the Partition ID of the larger section containing 'Partition' will be 'Parent Partition 1', the section containing 'Partition 1' will be 'Parent Partition 2' and so on.

Based on the Partition ID tab you select in the properties panel, that corresponding partition will be highlighted in orange, and its particular properties will be opened in the properties panel.